Update app.py

app.py

@@ -85,7 +85,7 @@ class QASystem:
             similarity_top_k=10,
             streaming=True,
             text_qa_template=prompt,
-            response_mode="compact", #tree_summarize, simple_summarize, compact
+            response_mode="tree_summarize", #tree_summarize, simple_summarize, compact
             embed_model=self.embedding_model
         )