improve display of retrieved documents

app.py

@@ -144,7 +144,12 @@ def retriever(query: str, selected_retriever: str):
 
         corpus = '\n\n'.join(topk_documents)
 
-        display_retrieved_documents = f"Retrieved Documents: \n{corpus}"
+        retrieved_document_titles = ""
+        for document in topk_documents:
+            title = document[:document.lower().index("abstract: ")].replace('\n', ' ')
+            retrieved_document_titles = f"{retrieved_document_titles}\n"
+
+        display_retrieved_documents = f"\nRetrieved Documents: \n{retrieved_document_titles}"
 
         for chunk in display_retrieved_documents.split():
             text += chunk + " "