diff --git a/.gitignore b/.gitignore
index cb158a7..7622569 100644
--- a/.gitignore
+++ b/.gitignore
@@ -10,5 +10,5 @@
 !requirements.txt
 !sql_api.py
 !twitter_api.py
-stream_answers.py
+!stream_answers.py
 !twitterbot.py
\ No newline at end of file
diff --git a/stream_answers.py b/stream_answers.py
new file mode 100644
index 0000000..6a1fb28
--- /dev/null
+++ b/stream_answers.py
@@ -0,0 +1,53 @@
+import json
+import time
+import requests
+
+import collect_followers
+import sql_api
+import twitter_api
+
+
+def stream(tweet_id):
+    """ Monitor answers to a tweet. """
+    # Make connection to SQL databse.
+    db = sql_api.DB()
+    api = twitter_api.API()
+
+    rules = api.get_rules()
+    api.delete_all_rules(rules)
+    api.set_rules(tweet_id)
+    response = requests.get(
+        "https://api.twitter.com/2/tweets/search/stream?expansions=referenced_tweets.id,author_id", auth=api.bearer_oauth, stream=True,
+    )
+    for response_line in response.iter_lines():
+        if response_line:
+            json_response = json.loads(response_line)
+            try:
+                twitter_username =  json_response['includes']['users'][0]['username']
+                mastodon_username = collect_followers.extract_mastodon_handle(json_response['includes']['tweets'][0]['text'])
+                
+                # Add Mastodon username to db.
+                columns = '"t_username", "m_username"'
+                values = [f'"{twitter_username}"', f'"{mastodon_username}"']
+                sql = f'INSERT OR REPLACE INTO  usernames ({columns}) VALUES ({", ".join(values)})'
+                db.commit(sql)
+
+                # Add reply to queue
+                id = str(json_response['data']['id'])
+                columns = '"t_username", "tweet_id", "timestamp"'
+                values = [f'"{twitter_username}"', f'"{id}"', str(int(time.time()))]
+                sql = f'INSERT OR REPLACE INTO  queue ({columns}) VALUES ({", ".join(values)})'
+                db.commit(sql)
+            except KeyError:
+                pass
+
+
+if __name__ == "__main__":
+
+    import sys
+    if len(sys.argv) > 1:
+        tweet_id = sys.argv[1]
+    else:
+        tweet_id = input('Tweet ID: ')
+    
+    stream(tweet_id)