Question: who presides over the meeting of municipal corporation
[{'answer': 'Sovan Chatterjee', 'provenance': [{'wikipedia_id': '4410763', 'title': 'Kolkata Municipal Corporation', 'start_paragraph_id': 3, 'start_character': 590, 'end_paragraph_id': 3, 'end_character': 606, 'bleu_score': 1.0, 'section': 'Section::::Structure.\n'}]}, {'provenance': [{'wikipedia_id': '4410763', 'title': 'Kolkata Municipal Corporation', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 366, 'bleu_score': 0.8416148311386301, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1690042582054551503}, 'section': 'Section::::Abstract.'}]}]