Add rate limit.

app.py

@@ -1,3 +1,4 @@
+import asyncio
 import os
 from pathlib import Path
 import gradio as gr
@@ -72,6 +73,9 @@ async def answer_question(agent, item, answers_payload, results_log):
         return
     try:
         submitted_answer = await agent(question_text)
+
+        # Avoid hitting the Google rate limits. 
+        await asyncio.sleep(60)
         answers_payload.append({"task_id": task_id, "submitted_answer": submitted_answer})
         results_log.append({"Task ID": task_id, "Question": question_text, "Submitted Answer": submitted_answer})
     except Exception as e: