Question: who led the 7th cavalry at wounded knee
[{'answer': 'Major Samuel M. Whitside', 'provenance': [{'wikipedia_id': '209886', 'title': 'Wounded Knee Massacre', 'start_paragraph_id': 2, 'start_character': 77, 'end_paragraph_id': 2, 'end_character': 101, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '209886', 'title': 'Wounded Knee Massacre', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 456, 'bleu_score': 0.904101501873357, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7283338021751270007}, 'section': 'Section::::Abstract.'}]}]