Question: which is india's second city to get the metro rail
[{'answer': 'Delhi Metro', 'provenance': [{'wikipedia_id': '26005906', 'title': 'Urban rail transit in India', 'start_paragraph_id': 3, 'start_character': 327, 'end_paragraph_id': 3, 'end_character': 338, 'bleu_score': 1.0, 'section': 'Section::::Rapid transit (metro).\n'}]}]