change code

app.py

@@ -31,8 +31,8 @@ class BasicAgent:
     def __call__(self, question: str) -> str:
         print(f"Agent received question (first 50 chars): {question[:50]}...")
         answer = self.agent.invoke({"messages": [("user", question)]})
-        print(f"Agent returning answer: {answer}")
-        return answer
+        print(f"Agent returning answer: {answer['messages'][-1].content}")
+        return answer['messages'][-1].content
 
 def run_and_submit_all( profile: gr.OAuthProfile | None):
     """