Question: number of oil refineries in the united states
[{'answer': '137'}, {'provenance': [{'wikipedia_id': '47348299', 'title': 'Petroleum refining in the United States', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 470, 'bleu_score': 0.9154668301325871, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8157092348443845927}, 'section': 'Section::::Abstract.'}]}]