diff --git a/linker.py b/linker.py
new file mode 100644
index 000000000..957ecbcbc
--- /dev/null
+++ b/linker.py
@@ -0,0 +1,72 @@
+import os
+import sys
+import re
+import posixpath
+import argparse
+
+linkre = re.compile(r"\[(.+?)\]\((.+?)\)")
+
+def normlink(link,start_link):
+    if link.startswith("http"):
+        return link
+    target = posixpath.normpath(link)
+    # Absolute path
+    if target[0] == "/":
+        return target
+    elif target.startswith("./"):
+        target = posixpath.normpath(start_link +  target)
+    else:
+        target = posixpath.normpath(start_link +  "/" + target)
+    #print(">>>>>>" + link + " " + target)
+    #print(target)
+    return target
+
+def process(lfrom,lto):
+    for root, dirs, files in os.walk("./pages", topdown=False):
+        for file_name in files:
+            if not file_name.endswith(".md"):
+                continue
+            full_file_name = root + "/"+ file_name
+            # strip README.md
+            page_name = full_file_name[7:-10]
+            #print(page_name)
+            def replink(match):
+                name = match.group(1)
+                target = normlink(match.group(2),page_name)
+                #print(lto)
+                #print(target)
+                out = match.group(0)
+                if target == lfrom:
+                    print("match at" + page_name + ":" + name)
+                    if lto:
+                        out = "[{}]({})".format(name,lto)
+                        #print("Replaced to " + out) 
+
+                return out
+
+            content = []
+            changed = False
+            with open(full_file_name) as f:
+                for l in f:
+                    if re.search(linkre,l) is not None:
+                        line = re.sub(linkre,replink,l)
+                        if line != l:
+                            print("replace")
+                            print(l.rstrip())
+                            print(line.rstrip())
+                            answer = sys.stdin.readline().strip()
+                            if len(answer) == 0 or answer[0] != "n":
+                                l = line
+                                changed = True
+                    content.append(l)
+            if lto and changed:
+                with open(full_file_name,"w") as f:
+                    f.write("".join(content))
+
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser()
+    parser.add_argument("lfrom")
+    parser.add_argument("-r","--replace",type=str)
+    args = parser.parse_args()
+    process(args.lfrom,args.replace)
+
diff --git a/pages/topics/chatbot/README.md b/pages/topics/chatbot/README.md
new file mode 100644
index 000000000..9af1ecb92
--- /dev/null
+++ b/pages/topics/chatbot/README.md
@@ -0,0 +1,38 @@
+---
+title: chatbot
+---
+
+# Chatbot
+
+Ciele: Vytvorenie demonštračnej aplikácie pre interaktívnu komunikáciu s
+automatom
+
+## Zdroje
+
+  - <https:%%//%%chatbotslife.com/how-you-can-build-your-first-chatbot-using-rasa-in-under-15-minutes-ce557ea52f2f>
+  - <https:%%//%%medium.com/analytics-vidhya/building-a-simple-chatbot-in-python-using-nltk-7c8c8215ac6e>
+
+### Prostriedky
+
+  - [RASA toolbox](https://rasa.com/)
+  - Slack(<https:%%//%%slack.com>) - ako rozhranie
+
+## Riešitelia
+
+  - Dmytro Ushatenko (Daniel Hládek), 19/20
+  - Jozef Olekšák (Stanislav Ondáš) 18/19 Riadenie dialógu na báze
+    štatických metód
+
+## Existujúce riešenia
+
+  - [KEMT Bot](https://kemt.fei.tuke.sk)
+  - <https:%%//%%jobothq.slack.com/>
+
+## Riešiteľ 1
+
+Zadanie:
+
+1.  Vypracujte úvod do problematiky systémov pre riadenie dialógu
+2.  Vypracujte prehľad používaných metód riadenia dialógu
+3.  Navrhnite a implementujte agenta pre zisťovanie informácií o katedre
+    KEM