Question: how long does it take for the ogallala aquifer to recharge
[{'answer': 'over 6,000 years', 'provenance': [{'wikipedia_id': '133495', 'title': 'Ogallala Aquifer', 'start_paragraph_id': 2, 'start_character': 557, 'end_paragraph_id': 2, 'end_character': 573, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '133495', 'title': 'Ogallala Aquifer', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 613, 'bleu_score': 0.9536330554540541, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10969073120756992275}, 'section': 'Section::::Abstract.'}]}]