> **Copied from upstream:** [dair-ai/Prompt-Engineering-Guide#268](https://github.com/dair-ai/Prompt-Engineering-Guide/issues/268) > **Original author:** @gaord > **Originally created:** 2023-08-10 --- the link is not accessible any more, please fix it. https://python.langchain.com/docs/modules/chains/index_examples/vector_db_qa_with_sources.html thanks!
the link is not accessible any more, please fix it.
https://python.langchain.com/docs/modules/chains/index_examples/vector_db_qa_with_sources.html
thanks!