Update app.py

app.py

@@ -91,4 +91,5 @@ def demo():
         # Chatbot events
         msg.submit(conversation, inputs=[qa_chain, msg, chatbot])
         submit_btn.click(conversation, inputs=[qa_chain, msg, chatbot])
-        clear_btn.click(lambda: [None, "", 0, "", 0, "", 0], inputs=None, outputs=[chatbot, doc_source1, source1_page, doc_source2, source2_
+        clear_btn.click(lambda: [None, "", 0, "", 0, "", 0], inputs=None, outputs=[chatbot, doc_source1, source1_page, doc_source2, source2_page, doc_source3, source3_page])
+