Question: where do most cities get their water supply
[{'answer': 'dams', 'provenance': [{'wikipedia_id': '8713214', 'title': 'Drinking water supply and sanitation in the United States', 'start_paragraph_id': 25, 'start_character': 86, 'end_paragraph_id': 25, 'end_character': 90, 'bleu_score': 1.0, 'section': 'Section::::Technical and environmental overview.:Infrastructure.\n'}]}, {'answer': 'reservoirs', 'provenance': [{'wikipedia_id': '8713214', 'title': 'Drinking water supply and sanitation in the United States', 'start_paragraph_id': 25, 'start_character': 95, 'end_paragraph_id': 25, 'end_character': 105, 'bleu_score': 1.0, 'section': 'Section::::Technical and environmental overview.:Infrastructure.\n'}]}, {'answer': 'well fields', 'provenance': [{'wikipedia_id': '8713214', 'title': 'Drinking water supply and sanitation in the United States', 'start_paragraph_id': 25, 'start_character': 107, 'end_paragraph_id': 25, 'end_character': 118, 'bleu_score': 1.0, 'section': 'Section::::Technical and environmental overview.:Infrastructure.\n'}]}, {'provenance': [{'wikipedia_id': '8713214', 'title': 'Drinking water supply and sanitation in the United States', 'start_paragraph_id': 25, 'start_character': 0, 'end_paragraph_id': 25, 'end_character': 628, 'bleu_score': 0.9788329837059241, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1273175629272405629}, 'section': 'Section::::Technical and environmental overview.:Infrastructure.\n'}]}]