Question: where does most of the oil in the us come from
[{'answer': 'the U.S.', 'provenance': [{'wikipedia_id': '9279937', 'title': 'United States energy independence', 'start_paragraph_id': 1, 'start_character': 190, 'end_paragraph_id': 1, 'end_character': 196, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '9279937', 'title': 'United States energy independence', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 338, 'bleu_score': 0.9657992495762461, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11610383113596919988}, 'section': 'Section::::Abstract.'}]}]