langchain==0.0.339 streamlit==1.29.0 google-ai-generativelanguage==0.4.0 google-generativeai==0.3.2 google-cloud-aiplatform==1.38.1 faiss-cpu==1.7.4 tiktoken==0.5.2 PyPDF2==3.0.1 sentence-transformers==2.2.2