Question: presents peptides to t cells and is only found on specific types of nucleated cells
[{'answer': 'MHC class I molecules', 'provenance': [{'wikipedia_id': '1892376', 'title': 'MHC class I', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 21, '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': 5015850503156442422}, 'section': 'Section::::Abstract.'}]}]