Question: what is the head of a long bone called
[{'answer': 'epiphysis', 'provenance': [{'wikipedia_id': '780913', 'title': 'Long bone', 'start_paragraph_id': 1, 'start_character': 347, 'end_paragraph_id': 1, 'end_character': 356, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '780913', 'title': 'Long bone', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 709, 'bleu_score': 0.9831208473513011, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6343376878782791966}, 'section': 'Section::::Abstract.'}]}]