text: <start_of_text>Build Haystack extractive qa system with FARMReader, ElasticsearchRetriever and OpenDistroElasticsearchDocumentStore<response>{"version": "1.6.0", "components": [{"name": "open_distro_elasticsearch_document_store", "type": "OpenDistroElasticsearchDocumentStore", "params": {"username": "admin", "password": "admin", "port": 0, "content_field": "content", "embedding_field": "embedding", "embedding_dim": 768, "analyzer": "standard", "verify_certs": false, "recreate_index": false, "refresh_type": "wait_for", "similarity": "cosine", "synonym_type": "synonym"}}, {"name": "elasticsearch_retriever", "type": "ElasticsearchRetriever", "params": {}}, {"name": "farm_reader", "type": "FARMReader", "params": {"context_window_size": 150, "top_k_per_sample": 1, "max_seq_len": 256, "doc_stride": 128}}], "pipelines": [{"name": "my_query_pipeline", "nodes": [{"inputs": ["Query"], "name": "elasticsearch_retriever"}, {"inputs": ["elasticsearch_retriever"], "name": "farm_reader"}]}]}<end_of_text>