Question: which is called the green city of india
[{'answer': 'Bhopal', 'provenance': [{'wikipedia_id': '7706337', 'title': 'Green City', 'start_paragraph_id': 2, 'start_character': 12, 'end_paragraph_id': 2, 'end_character': 18, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Gandhinagar', 'provenance': [{'wikipedia_id': '7706337', 'title': 'Green City', 'start_paragraph_id': 3, 'start_character': 12, 'end_paragraph_id': 3, 'end_character': 23, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Trivandrum', 'provenance': [{'wikipedia_id': '7706337', 'title': 'Green City', 'start_paragraph_id': 4, 'start_character': 12, 'end_paragraph_id': 4, 'end_character': 22, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]