Question: which is the cleanest city of india 2017
[{'answer': 'Indore', 'provenance': [{'wikipedia_id': '35366335', 'title': 'List of cleanest cities in India', 'start_paragraph_id': 3, 'start_character': 62, 'end_paragraph_id': 3, 'end_character': 68, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]