Question: where do sperms get the energy required to keep the flagella moving
[{'answer': 'ATP produced by mitochondria', 'provenance': [{'wikipedia_id': '13798173', 'title': 'Sperm motility', 'start_paragraph_id': 9, 'start_character': 202, 'end_paragraph_id': 9, 'end_character': 230, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '13798173', 'title': 'Sperm motility', 'start_paragraph_id': 9, 'start_character': 0, 'end_paragraph_id': 9, 'end_character': 365, 'bleu_score': 0.9155272930874561, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12814290582010985501}, 'section': 'Section::::Abstract.'}]}]