Question: when did isaiah thomas go to the cavs
[{'answer': 'August 22 , 2017', 'provenance': [{'wikipedia_id': '21374258', 'title': 'Isaiah Thomas (basketball)', 'start_paragraph_id': 31, 'start_character': 3, 'end_paragraph_id': 31, 'end_character': 19, 'bleu_score': 1.0, 'section': 'Section::::Professional career.:Cleveland Cavaliers (2017–2018).\n'}]}, {'provenance': [{'wikipedia_id': '21374258', 'title': 'Isaiah Thomas (basketball)', 'start_paragraph_id': 31, 'start_character': 0, 'end_paragraph_id': 31, 'end_character': 1551, 'bleu_score': 0.9172901326401781, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9474715587856639339}, 'section': 'Section::::Professional career.:Cleveland Cavaliers (2017–2018).\n'}]}]