Question: who is most successful captain of indian cricket team
[{'answer': 'Mahendra Singh Dhoni', 'provenance': [{'wikipedia_id': '2068522', 'title': 'List of India national cricket captains', 'start_paragraph_id': 1, 'start_character': 259, 'end_paragraph_id': 1, 'end_character': 279, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '2068522', 'title': 'List of India national cricket captains', 'start_paragraph_id': 6, 'start_character': 0, 'end_paragraph_id': 6, 'end_character': 174, 'bleu_score': 0.83851300471302, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9405121446511385333}, 'section': 'Section::::Men’s cricket.:Test match captains.\n'}]}]