Question: which is the first nuclear submarine to be designed and built in india
[{'answer': 'Arihant - class', 'provenance': [{'wikipedia_id': '6167989', 'title': 'Arihant-class submarine', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 23, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '6167989', 'title': 'Arihant-class submarine', 'start_paragraph_id': 8, 'start_character': 0, 'end_paragraph_id': 8, 'end_character': 530, 'bleu_score': 0.546370766568552, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 802694113861268192}, 'section': 'Section::::Description.\n'}]}]