Question: what is the cost of mona lisa painting
[{'answer': '$790 million in 2016'}, {'provenance': [{'wikipedia_id': '235235', 'title': 'List of most expensive paintings', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 506, 'bleu_score': 0.677436681092462, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6052063777659260140}, 'section': 'Section::::Background.\n'}]}]