langchain accelerate duckduckgo_search transformers==4.27.1 unstructured[local-inference] layoutparser[layoutmodels,tesseract] nltk sentence-transformers beautifulsoup4 icetk cpm_kernels faiss-cpu gradio nltk accelerate detectron2@git+https://github.com/facebookresearch/detectron2.git@v0.6#egg=detectron2