Question: what is the scientific name of thigh bone
[{'answer': 'femur', 'provenance': [{'wikipedia_id': '188497', 'title': 'Femur', 'start_paragraph_id': 1, 'start_character': 4, 'end_paragraph_id': 1, 'end_character': 9, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '188497', 'title': 'Femur', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 425, 'bleu_score': 0.5130660036088991, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3691725295046175536}, 'section': 'Section::::Abstract.'}]}]