Question: which is the biggest public sector bank in india
[{'answer': 'State Bank of India', 'provenance': [{'wikipedia_id': '33383806', 'title': 'Public sector banks in India', 'start_paragraph_id': 4, 'start_character': 201, 'end_paragraph_id': 4, 'end_character': 220, 'bleu_score': 1.0, 'section': 'Section::::History.:Emergence of public sector banks.\n'}]}, {'provenance': [{'wikipedia_id': '33383806', 'title': 'Public sector banks in India', 'start_paragraph_id': 4, 'start_character': 0, 'end_paragraph_id': 4, 'end_character': 395, 'bleu_score': 0.9720210313175831, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4364709503087821754}, 'section': 'Section::::History.:Emergence of public sector banks.\n'}]}]