Question: who is a richest person in the world
[{'answer': 'Amazon founder Jeff Bezos', 'provenance': [{'wikipedia_id': '33331732', 'title': "The World's Billionaires", 'start_paragraph_id': 2, 'start_character': 414, 'end_paragraph_id': 2, 'end_character': 439, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '33331732', 'title': "The World's Billionaires", 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 544, 'bleu_score': 0.8025972717574541, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3829704958778064584}, 'section': 'Section::::Abstract.'}]}]