Question: problem of water pollution with arsenic is maximum in which state of india
[{'answer': 'West Bengal', 'provenance': [{'wikipedia_id': '5361990', 'title': 'Arsenic contamination of groundwater', 'start_paragraph_id': 17, 'start_character': 3, 'end_paragraph_id': 17, 'end_character': 14, 'bleu_score': 1.0, 'section': 'Section::::Contamination in specific nations and regions.:India and Bangladesh.\n'}]}, {'provenance': [{'wikipedia_id': '5361990', 'title': 'Arsenic contamination of groundwater', 'start_paragraph_id': 18, 'start_character': 0, 'end_paragraph_id': 18, 'end_character': 1056, 'bleu_score': 0.5788521730441321, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4368407543049783225}, 'section': 'Section::::Contamination in specific nations and regions.:India and Bangladesh.\n'}]}]