Question: who was the lakota leader who was arrested by the us army
[{'answer': 'Sitting Bull', 'provenance': [{'wikipedia_id': '152833', 'title': 'Sitting Bull', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 12, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '152833', 'title': 'Sitting Bull', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 385, 'bleu_score': 0.7567402563168281, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1742645433608935920}, 'section': 'Section::::Abstract.'}]}]