text: LOTR (Merger Retriever)Lord of the Retrievers, also known as MergerRetriever, takes a list of retrievers as input and merges the results of their getrelevantdocuments() methods into a single list. The merged results will be a list of documents that are relevant to the query and that have been ranked by the different retrievers.ğŸ“„ï¸� MetalMetal is a managed service for ML Embeddings.ğŸ“„ï¸� Pinecone Hybrid SearchPinecone is a vector database with broad functionality.ğŸ“„ï¸� PubMedThis notebook goes over how to use PubMed as a retrieverğŸ“„ï¸� SVMSupport vector machines (SVMs) are a set of supervised learning methods used for classification, regression and outliers detection.ğŸ“„ï¸� TF-IDFTF-IDF means term-frequency times inverse document-frequency.ğŸ“„ï¸� VespaVespa is a fully featured search engine and vector database. It supports vector search (ANN), lexical search, and search in structured data, all in the same query.ğŸ“„ï¸� Weaviate Hybrid SearchWeaviate is an open source vector database.ğŸ“„ï¸� WikipediaWikipedia is a multilingual free online encyclopedia written and maintained by a community of volunteers, known as Wikipedians, through open collaboration and using a wiki-based editing system called MediaWiki. Wikipedia is the largest and most-read reference work in history.ğŸ“„ï¸� ZepRetriever Example for Zep - A long-term memory store for LLM applications.PreviousZep MemoryNextAmazon KendraCommunityDiscordTwitterGitHubPythonJS/TSMoreHomepageBlogCopyright Â© 2023 LangChain, Inc.