Question: who acts as the chairman of election commission
[{'answer': 'Chief Election Commissioner', 'provenance': [{'wikipedia_id': '2445351', 'title': 'Chief Election Commissioner of India', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 27, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '2445351', 'title': 'Chief Election Commissioner of India', 'start_paragraph_id': 1, 'start_character': 65, 'end_paragraph_id': 1, 'end_character': 633, 'bleu_score': 0.722324962265916, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8418704250179694319}, 'section': 'Section::::Abstract.'}]}]