Question: what state is in the center of the united states
[{'answer': 'Kansas', 'provenance': [{'wikipedia_id': '5385152', 'title': 'Geographic center of the contiguous United States', 'start_paragraph_id': 3, 'start_character': 99, 'end_paragraph_id': 3, 'end_character': 105, 'bleu_score': 1.0, 'section': 'Section::::Overview.\n'}]}]