Update book_metadata_retriever.py

book_metadata_retriever.py

@@ -54,6 +54,7 @@ def answer(query, threshold=0.5, top_n=10):
             "Book": data['Book Title'].iloc[index],
             "Author": data['Author'].iloc[index],
             "Edition": data['Edition'].iloc[index],
+            "Copyright Year": data['Copyright Year'].iloc[index],
             "File Name": data['File_name'].iloc[index]
         }
         ranked_documents.append(document_details)