https://github.com/langchain-tech/unstructured-io-demo/tree/main https://github.com/langchain-ai/langchain/blob/master/cookbook/Semi_structured_multi_modal_RAG_LLaMA2.ipynb https://ucd-dnp.github.io/ConTexto/versiones/master/instalacion/instalacion_popple_teseract_windows.html https://langchain-ai.github.io/langgraph/tutorials/rag/langgraph_adaptive_rag_local/ https://docs.unstructured.io/examplecode/notebooks