Question: the mhc class 1 molecule is recognized by which cell type
[{'answer': 'cytotoxic T cells', 'provenance': [{'wikipedia_id': '1892376', 'title': 'MHC class I', 'start_paragraph_id': 1, 'start_character': 370, 'end_paragraph_id': 1, 'end_character': 387, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1892376', 'title': 'MHC class I', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 711, 'bleu_score': 0.9405441894619311, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9142506134253271237}, 'section': 'Section::::Abstract.'}]}]