text: And if we are to advance liberty and justice, we need to secure the Border and fix the immigration system.You can of course use this retriever within a QA pipelinefrom langchain.chains import RetrievalQAchain = RetrievalQA.from_chain_type(    llm=OpenAI(temperature=0), retriever=compression_retriever)chain({"query": query})    {'query': 'What did the president say about Ketanji Brown Jackson',     'result': " The president said that Ketanji Brown Jackson is one of the nation's top legal minds and that she is a consensus builder who has received a broad range of support from the Fraternal Order of Police to former judges appointed by Democrats and Republicans."}PreviousChatGPT PluginNextDocArray RetrieverSet up the base vector store retrieverDoing reranking with CohereRerankCommunityDiscordTwitterGitHubPythonJS/TSMoreHomepageBlogCopyright Â© 2023 LangChain, Inc.