Question: where does most of the worlds oil come from
[{'answer': 'Venezuela', 'provenance': [{'wikipedia_id': '2053440', 'title': 'Oil reserves', 'start_paragraph_id': 3, 'start_character': 128, 'end_paragraph_id': 3, 'end_character': 137, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]