langchain==0.1.20 streamlit==1.31.1 langchain-openai==0.0.8 python-dotenv==1.0.1 openai==1.12.0 beautifulsoup4==4.12.3 langchain_text_splitters==0.0.1 chromadb==0.4.3 langchainhub==0.1.15 langchain-community==0.0.38 langchain-core==0.1.52 sentence-transformers selenium==4.20.0 openpyxl bs4 unstructured==0.13.7 openpyxl