chromadb==0.4.13 langchain==0.0.305 streamlit==1.31.1 sentence-transformers==2.3.1 rank-bm25==0.2.2 streamlit-chat==0.1.1 gdown==4.7.3 streamlit-option-menu==0.3.12 duckduckgo-search==4.4.3 pypdf==4.0.1