sentence-transformers pytorch bert fill-mask information retrieval ir documents retrieval passage retrieval beir benchmark sts semantic search feature-extraction sentence-similarity transformers custom_code en dataset:sentence-transformers/embedding-training-data dataset:flax-sentence-embeddings/stackexchange_xml dataset:snli dataset:eli5 dataset:search_qa dataset:multi_nli dataset:wikihow dataset:natural_questions dataset:trivia_qa dataset:ms_marco dataset:gooaq dataset:yahoo_answers_topics autotrain_compatible text-embeddings-inference region:us