Update app.py

app.py

@@ -196,7 +196,7 @@ async def chat(query,history,audience,sources,reports):
         if os.getenv("GRADIO_ENV") != "local":
             timestamp = str(datetime.now().timestamp())
             file = timestamp + ".json"
-            prompt = history[-1][0]
+            prompt = history[1]["content"]
             logs = {
                 "user_id": str(user_id),
                 "prompt": prompt,