Question: who was the leader of the revolt of 1857 in bihar
[{'answer': 'Kunwar Singh', 'provenance': [{'wikipedia_id': '20513364', 'title': 'Kunwar Singh', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 12, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '20513364', 'title': 'Kunwar Singh', 'start_paragraph_id': 1, 'start_character': 86, 'end_paragraph_id': 1, 'end_character': 527, 'bleu_score': 0.8093086454899191, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5149055058349406092}, 'section': 'Section::::Abstract.'}]}]