Question: when did vasari write lives of the artists
[{'answer': '1550', 'provenance': [{'wikipedia_id': '102036', 'title': 'Giorgio Vasari', 'start_paragraph_id': 15, 'start_character': 324, 'end_paragraph_id': 15, 'end_character': 328, 'bleu_score': 1.0, 'section': 'Section::::"The Lives of the Most Excellent Painters, Sculptors, and Architects".\n'}]}, {'provenance': [{'wikipedia_id': '102036', 'title': 'Giorgio Vasari', 'start_paragraph_id': 15, 'start_character': 0, 'end_paragraph_id': 15, 'end_character': 861, 'bleu_score': 0.9860618656782161, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7577809859875232396}, 'section': 'Section::::"The Lives of the Most Excellent Painters, Sculptors, and Architects".\n'}]}]