Question: who attacked a government weapons storehouse at harpers ferry in 1859
[{'answer': 'John Brown', 'provenance': [{'wikipedia_id': '19825348', 'title': "John Brown's raid on Harpers Ferry", 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 10, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '19825348', 'title': "John Brown's raid on Harpers Ferry", 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 608, 'bleu_score': 0.614183003580951, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13931769978396861585}, 'section': 'Section::::Abstract.'}]}]