Update app.py

app.py

@@ -12,7 +12,8 @@ import google.generativeai as genai
 from functools import lru_cache
 from tenacity import retry, stop_after_attempt, wait_exponential
 from langchain_community.retrievers import BM25Retriever
-from langchain_community.vectorstores import FAISS
+from langchain_community.vectorstores import
+ FAISS
 from langchain_core.embeddings import Embeddings
 from langchain_core.documents import Document
 from collections import defaultdict
@@ -210,7 +211,7 @@ class EnhancedRetriever:
 SYSTEM_PROMPT = """**Biomimicry Expert Guidelines**
 1. Base answers strictly on context
 2. **Bold** technical terms
-3. Include reference links at the end of the response
+3. Must Include reference links 
 
 Context: {context}"""