Question: who play the role of krishna in mahabharat
[{'answer': 'Nitish Bharadwaj', 'provenance': [{'wikipedia_id': '7287912', 'title': 'Nitish Bharadwaj', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 16, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '7287912', 'title': 'Nitish Bharadwaj', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 557, 'bleu_score': 0.594638552136128, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3909650106236520215}, 'section': 'Section::::Abstract.'}]}]