Question: who has the biggest oil reserve in the world
[{'answer': 'Venezuela', 'provenance': [{'wikipedia_id': '13212005', 'title': 'List of countries by proven oil reserves', 'start_paragraph_id': 3, 'start_character': 352, 'end_paragraph_id': 3, 'end_character': 361, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]