transformers pytorch gpt2 text-generation medical en dataset:raidium/ECNQA_generated_questions dataset:raidium/ECN-QA arxiv:2405.14654 base_model:stanford-crfm/BioMedLM base_model:finetune:stanford-crfm/BioMedLM license:apache-2.0 autotrain_compatible text-generation-inference endpoints_compatible region:us