diff --git a/pages/students/2016/jakub_maruniak/dp2021/annotation/custom_train.py b/pages/students/2016/jakub_maruniak/dp2021/annotation/custom_train.py
new file mode 100644
index 0000000000..f8c3f01fba
--- /dev/null
+++ b/pages/students/2016/jakub_maruniak/dp2021/annotation/custom_train.py
@@ -0,0 +1,152 @@
+"""Scripts used for training and evaluation of NER models
+Usage example:
+$ python custom_train.py train ./model ./train.jsonl ./eval.jsonl -o ./output_dir -n 15
+Requirements:
+spacy>=2.2.3
+https://github.com/explosion/projects/tree/master/ner-drugs
+"""
+import spacy
+from spacy.cli.train import _load_pretrained_tok2vec
+from timeit import default_timer as timer
+from pathlib import Path
+import srsly
+from wasabi import msg
+import random
+import plac
+import sys
+import tqdm
+
+
+def format_data(data):
+    result = []
+    labels = set()
+    for eg in data:
+        if eg["answer"] != "accept":
+            continue
+        ents = [(s["start"], s["end"], s["label"]) for s in eg.get("spans", [])]
+        labels.update([ent[2] for ent in ents])
+        result.append((eg["text"], {"entities": ents}))
+    return result, labels
+
+
+@plac.annotations(
+    model=("The base model to load or blank:lang", "positional", None, str),
+    train_path=("The training data (Prodigy JSONL)", "positional", None, str),
+    eval_path=("The evaluation data (Prodigy JSONL)", "positional", None, str),
+    n_iter=("Number of iterations", "option", "n", int),
+    output=("Optional output directory", "option", "o", str),
+    tok2vec=("Pretrained tok2vec weights to initialize model", "option", "t2v", str),
+)
+def train_model(
+    model, train_path, eval_path, n_iter=10, output=None, tok2vec=None,
+):
+    """
+    Train a model from Prodigy annotations and optionally save out the best
+    model to disk.
+    """
+    spacy.util.fix_random_seed(0)
+    with msg.loading(f"Loading '{model}'..."):
+        if model.startswith("blank:"):
+            nlp = spacy.blank(model.replace("blank:", ""))
+        else:
+            nlp = spacy.load(model)
+    msg.good(f"Loaded model '{model}'")
+    train_data, labels = format_data(srsly.read_jsonl(train_path))
+    eval_data, _ = format_data(srsly.read_jsonl(eval_path))
+    ner = nlp.create_pipe("ner")
+    for label in labels:
+        ner.add_label(label)
+    nlp.add_pipe(ner)
+    t2v_cfg = {
+        "embed_rows": 10000,
+        "token_vector_width": 128,
+        "conv_depth": 8,
+        "nr_feature_tokens": 3,
+    }
+    optimizer = nlp.begin_training(component_cfg={"ner": t2v_cfg} if tok2vec else {})
+    if tok2vec:
+        _load_pretrained_tok2vec(nlp, Path(tok2vec))
+    batch_size = spacy.util.compounding(1.0, 32.0, 1.001)
+    best_acc = 0
+    best_model = None
+    row_widths = (2, 8, 8, 8, 8)
+    msg.row(("#", "L", "P", "R", "F"), widths=row_widths)
+    for i in range(n_iter):
+        random.shuffle(train_data)
+        losses = {}
+        data = tqdm.tqdm(train_data, leave=False)
+        for batch in spacy.util.minibatch(data, size=batch_size):
+            texts, annots = zip(*batch)
+            nlp.update(texts, annots, drop=0.2, losses=losses)
+        with nlp.use_params(optimizer.averages):
+            sc = nlp.evaluate(eval_data)
+            if sc.ents_f > best_acc:
+                best_acc = sc.ents_f
+                if output:
+                    best_model = nlp.to_bytes()
+        acc = (f"{sc.ents_p:.3f}", f"{sc.ents_r:.3f}", f"{sc.ents_f:.3f}")
+        msg.row((i + 1, f"{losses['ner']:.2f}", *acc), widths=row_widths)
+    msg.text(f"Best F-Score: {best_acc:.3f}")
+    if output and best_model:
+        with msg.loading("Saving model..."):
+            nlp.from_bytes(best_model).to_disk(output)
+        msg.good("Saved model", output)
+
+
+@plac.annotations(
+    model=("The model to evaluate", "positional", None, str),
+    eval_path=("The evaluation data (Prodigy JSONL)", "positional", None, str),
+)
+def evaluate_model(model, eval_path):
+    """
+    Evaluate a trained model on Prodigy annotations and print the accuracy.
+    """
+    with msg.loading(f"Loading model '{model}'..."):
+        nlp = spacy.load(model)
+    data, _ = format_data(srsly.read_jsonl(eval_path))
+    sc = nlp.evaluate(data)
+    result = [
+        ("Precision", f"{sc.ents_p:.3f}"),
+        ("Recall", f"{sc.ents_r:.3f}"),
+        ("F-Score", f"{sc.ents_f:.3f}"),
+    ]
+    msg.table(result)
+
+
+@plac.annotations(
+    model=("The model to evaluate", "positional", None, str),
+    data=("Raw data as JSONL", "positional", None, str),
+)
+def wps(model, data):
+    """
+    Measure the processing speed in words per second. It's recommended to
+    use a larger corpus of raw text here (e.g. a few million words).
+    """
+    with msg.loading(f"Loading model '{model}'..."):
+        nlp = spacy.load(model)
+    texts = (eg["text"] for eg in srsly.read_jsonl(data))
+    n_docs = 0
+    n_words = 0
+    start_time = timer()
+    for doc in nlp.pipe(texts):
+        n_docs += 1
+        n_words += len(doc)
+    end_time = timer()
+    wps = int(n_words / (end_time - start_time))
+    result = [
+        ("Docs", f"{n_docs:,}"),
+        ("Words", f"{n_words:,}"),
+        ("Words/s", f"{wps:,}"),
+    ]
+    msg.table(result, widths=(7, 12), aligns=("l", "r"))
+
+
+if __name__ == "__main__":
+    opts = {"train": train_model, "evaluate": evaluate_model, "wps": wps}
+    cmd = sys.argv.pop(1)
+    if cmd not in opts:
+        msg.fail(f"Unknown command: {cmd}", f"Available: {', '.join(opts)}", exits=1)
+    try:
+        plac.call(opts[cmd])
+    except KeyboardInterrupt:
+        msg.warn("Stopped.", exits=1)
\ No newline at end of file
diff --git a/pages/students/2016/jakub_maruniak/dp2021/annotation/scripts.py b/pages/students/2016/jakub_maruniak/dp2021/annotation/scripts.py
new file mode 100644
index 0000000000..ea6b21544c
--- /dev/null
+++ b/pages/students/2016/jakub_maruniak/dp2021/annotation/scripts.py
@@ -0,0 +1,160 @@
+"""
+Usage example:
+$ python scripts.py delete_annot jakub.maruniak ./dataset.jsonl ./new_dataset.jsonl
+
+To see available commands:
+$ python scripts.py help 
+
+To see available arguments:
+$ python scripts.py [command] --help 
+"""
+import spacy
+import srsly
+from wasabi import msg
+import plac
+import sys
+import re
+import itertools
+
+@plac.annotations(
+    dataset_path=("Path to dataset (Prodigy JSONL format)", "positional", None, str),
+)
+def count(
+    dataset_path
+):
+    """     
+    Print statistics about Prodigy JSONL dataset.
+    Prints number of accepted, rejected and ignored articles.
+    Prints number of annotations of each entity type.
+    Prints how much annotations were made by each annotator. 
+    """    
+    # load data
+    # filename = 'ner/skner/sknerv4spans.jsonl'
+    file = open(sys.argv[1], 'rt', encoding='utf-8')
+    text = file.read()
+
+    # count articles
+    countAccept = text.count('accept')
+    countReject = text.count('reject')
+    countSkip = text.count('ignore')
+    countSpans = text.count('tokens')
+    # count entities
+    countPER = text.count('PER')
+    countLOC = text.count('LOC')
+    countORG = text.count('ORG')
+    countMISC = text.count('MISC')
+
+    underline = '\033[04m'
+    reset = '\033[0m'
+    red = '\033[31m'
+    green='\033[32m'
+    gray='\033[37m'
+
+    # table v1
+    #from lib import TableIt
+    #table1 = [    
+    #    ['Prijatých', countAccept],   
+    #    ['Zamietnutých', countReject],
+    #    ['Preskočených', countSkip],
+    #    ['------------', '------------'],
+    #    ['Spolu', countSpans]
+    #]
+    #
+    #table = [    
+    #    ['Entita', 'Počet'],   
+    #    ['PER', countPER],
+    #    ['LOC', countLOC],
+    #    ['ORG', countORG],
+    #    ['MISC', countMISC]
+    #]
+    #print('\nPočet anotovaných článkov:')
+    #TableIt.printTable(table1)
+    #print('\nPočet jednotlivých entít:')
+    #TableIt.printTable(table, useFieldNames=True, color=(26, 156, 171))
+
+    # table v2
+    print(underline + '\nPočet anotovaných článkov:' + reset)
+    print(green + "%-15s %-20s" %("Prijatých", countAccept) + reset)
+    print(red + "%-15s %-15s" %("Zamietnutých", countReject) + reset)
+    print(gray + "%-15s %-15s" %("Preskočených", countSkip) + reset)
+    print("%-15s" %("---------------------"))
+    print("%-15s %-15s" %("Spolu", countSpans))
+
+    print(underline + '\nPočet jednotlivých entít:' + reset)
+    print("%-10s %-10s" %("Entita:", "Počet:"))
+    print("%-10s" %("----------------"))
+    print("%-10s %-10s" %("PER", countPER))
+    print("%-10s %-10s" %("LOC", countLOC))
+    print("%-10s %-10s" %("ORG", countORG))
+    print("%-10s %-10s" %("MISC", countMISC))
+
+        # kto anotoval koľko?
+    frequency = {}
+    #Open the sample text file in read mode.
+        #document_text = open('sample.txt', 'r')
+    #convert the string of the document in lowercase and assign it to text_string variable.
+        #text = document_text.read().lower()
+    regex1 = '"_session_id":(.*?),'
+    pattern = re.findall(regex1, text)
+    for word in pattern:
+        count = frequency.get(word,0)
+        frequency[word] = count + 1
+    frequency_list = frequency.keys()
+    print(underline + '\nKto anotoval koľko článkov?' + reset)
+    for words in frequency_list:
+        print(words, frequency[words])
+
+
+@plac.annotations(
+    annotator=("Keep annotations from this annotator (email address or nickname)", "positional", None, str),
+    dataset_path=("Path to dataset (Prodigy JSONL format)", "positional", None, str),
+    new_dataset_path=("Path to save new dataset(Prodigy JSONL format)", "positional", None, str),
+)
+def delete_annot(
+    annotator, dataset_path, new_dataset_path
+):
+    """     
+    Load Prodigy JSONL dataset, 
+    and keep annotations only from one annotator.
+    """    
+    file1 = open(sys.argv[2], 'r', encoding='utf-8') 
+    file2 = open(sys.argv[3],'w', encoding='utf-8') 
+    
+    for line in file1.readlines(): 
+        x = re.findall(sys.argv[1], line) 
+        if x: 
+            print(line) 
+            file2.write(line) 
+            
+    file1.close() 
+    file2.close() 
+
+def modelinfo(
+):
+    """     
+    Print information about trained model (Precision, Recall and F-Score)
+    """  
+    with open('build/train/nerposparser/model-best/meta.json', 'rt') as f:
+        for line in itertools.islice(f, 31, 54):
+            print(line, end =" ") 
+
+def helpme(
+):
+    print("Available commands:",
+    "\ncount - Print statistics about Prodigy JSONL dataset",
+    "\ndelete_annot - Create dataset with annotations from only specific annotator",
+    "\nmodelinfo - Prints informations about trained model (Precision, Recall and F-Score)")
+
+
+if __name__ == "__main__":
+    opts = {"count": count,
+            "delete_annot": delete_annot,
+            "modelinfo": modelinfo,
+            "help": helpme}
+    cmd = sys.argv.pop(1)
+    if cmd not in opts:
+        msg.fail(f"Unknown command: {cmd}", f"Available: {', '.join(opts)}", exits=1)
+    try:
+        plac.call(opts[cmd])
+    except KeyboardInterrupt:
+        msg.warn("Stopped.", exits=1)
\ No newline at end of file
diff --git a/pages/students/2016/jakub_maruniak/dp2021/annotation/train.sh b/pages/students/2016/jakub_maruniak/dp2021/annotation/train.sh
new file mode 100644
index 0000000000..ba731b8d6e
--- /dev/null
+++ b/pages/students/2016/jakub_maruniak/dp2021/annotation/train.sh
@@ -0,0 +1,24 @@
+set -e
+OUTDIR=build/train/output
+TRAINDIR=build/train
+
+# Delete old training results
+rm -r $TRAINDIR
+   
+mkdir -p $TRAINDIR
+mkdir -p $OUTDIR
+mkdir -p dist
+# Delete old training results
+rm -rf $OUTDIR/*
+# Train dependency and POS
+spacy train sk $OUTDIR ./build/input/slovak-treebank ./build/input/ud-artificial-gapping  --n-iter 15 -p tagger,parser
+rm -rf $TRAINDIR/posparser
+mv $OUTDIR/model-best $TRAINDIR/posparser
+# Train NER
+# custom script for training, but it takes too long... input is JSONL file (db from Prodigy)
+# python custom_train.py train ./build/train/posparser ./train.jsonl ./eval.jsonl -o ./build/train/nerposparser -n 15
+spacy train sk $TRAINDIR/nerposparser ./ner/experiments/34sknerfull.json ./ner/experiments/34wikiartfull.json --n-iter 15 -p ner
+# Package model
+spacy package $TRAINDIR/nerposparser dist --meta-path ./meta.json --force
+cd dist/sk_sk1-0.2.0
+python ./setup.py sdist --dist-dir ../
diff --git a/pages/students/2016/jakub_maruniak/dp2021/annotation/visualizer.py b/pages/students/2016/jakub_maruniak/dp2021/annotation/visualizer.py
new file mode 100644
index 0000000000..a44fa7ea06
--- /dev/null
+++ b/pages/students/2016/jakub_maruniak/dp2021/annotation/visualizer.py
@@ -0,0 +1,80 @@
+"""
+Visualize the data with Streamlit and spaCy.
+https://github.com/explosion/projects/blob/master/ner-drugs/streamlit_visualizer.py
+
+Usage example:
+$ streamlit run visualizer.py visualize ./dataset.jsonl
+"""
+import streamlit as st
+from spacy import displacy
+import srsly
+import sys
+import plac
+from wasabi import msg
+
+@plac.annotations(
+    dataset_path=("Path to dataset (Prodigy JSONL format)", "positional", None, str),
+)
+def visualize(
+    dataset_path
+):
+    FILES = [sys.argv[1]]
+    MISC = "MISC"
+
+    HTML_WRAPPER = "<div style='border-bottom: 1px solid #ccc; padding: 20px 0'>{}</div>"
+    HTML_WRAPPER1 = "<div style='border-bottom: 2px solid #000; padding: 0 0 20px 0'>{}</div>"
+    SETTINGS = {"style": "ent", "manual": True, "options": {"colors": {MISC: "#d1bcff"}}}
+
+    @st.cache(allow_output_mutation=True)
+    def load_data(filepath):
+        return list(srsly.read_jsonl(filepath))
+
+    st.sidebar.title("Data visualizer")
+    st.sidebar.markdown(
+        "Visualize the annotations using [displaCy](https://spacy.io/usage/visualizers) "
+        "and view stats about the datasets."
+    )
+    data_file = st.sidebar.selectbox("Dataset", FILES)
+    data = load_data(data_file)
+    n_no_ents = 0
+    n_total_ents = 0
+    accepted = 0
+    rejected = 0
+
+    st.header(f"Dataset: {data_file} ({len(data)})")
+    st.markdown(HTML_WRAPPER1.format("Visualize only accepted examples and their annotations."), unsafe_allow_html=True)
+    for eg in data:
+        if eg["answer"] == "accept":
+            accepted += 1
+        if eg["answer"] != "accept":
+            rejected += 1
+            continue
+        row = {"text": eg["text"], "ents": eg.get("spans", [])}
+        answer = {"answer": eg.get("answer", [])}
+        n_total_ents += len(row["ents"])
+        if not row["ents"]:
+            n_no_ents += 1
+        html = displacy.render(row, **SETTINGS).replace("\n\n", "\n")
+        st.markdown(HTML_WRAPPER.format(html), unsafe_allow_html=True)
+
+    st.sidebar.markdown(
+        f"""        
+    | `{data_file}` | |
+    | --- | ---: |
+    | Total examples | {len(data):,} |
+    | Accepted examples | {accepted:,} |
+    | Rejected examples | {rejected:,} |
+    | Total entities | {n_total_ents:,} |
+    | Examples with no entities | {n_no_ents:,} |
+    """, unsafe_allow_html=True
+    )
+
+if __name__ == "__main__":
+    opts = {"visualize": visualize}
+    cmd = sys.argv.pop(1)
+    if cmd not in opts:
+        msg.fail(f"Unknown command: {cmd}", f"Available: {', '.join(opts)}", exits=1)
+    try:
+        plac.call(opts[cmd])
+    except KeyboardInterrupt:
+        msg.warn("Stopped.", exits=1)
\ No newline at end of file