Question: where does final maturation of a sperm cell occur
[{'answer': 'epididymis', 'provenance': [{'wikipedia_id': '505484', 'title': 'Spermatogenesis', 'start_paragraph_id': 7, 'start_character': 150, 'end_paragraph_id': 7, 'end_character': 160, 'bleu_score': 1.0, 'section': 'Section::::Location in humans.\n'}]}, {'provenance': [{'wikipedia_id': '505484', 'title': 'Spermatogenesis', 'start_paragraph_id': 7, 'start_character': 0, 'end_paragraph_id': 7, 'end_character': 902, 'bleu_score': 0.9607526871878451, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15648901319950076996}, 'section': 'Section::::Location in humans.\n'}]}]