Question: what is the typical source of well water
[{'answer': 'aquifer', 'provenance': [{'wikipedia_id': '15105978', 'title': 'Well', 'start_paragraph_id': 1, 'start_character': 229, 'end_paragraph_id': 1, 'end_character': 236, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '15105978', 'title': 'Well', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 914, 'bleu_score': 0.986253478180058, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2688520360920292219}, 'section': 'Section::::Abstract.'}]}]