Question: when did kevin durant start playing for golden state
[{'answer': '2016', 'provenance': [{'wikipedia_id': '6933101', 'title': 'Kevin Durant', 'start_paragraph_id': 1, 'start_character': 465, 'end_paragraph_id': 1, 'end_character': 469, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '6933101', 'title': 'Kevin Durant', 'start_paragraph_id': 28, 'start_character': 0, 'end_paragraph_id': 28, 'end_character': 482, 'bleu_score': 0.6660382686956761, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1380580339620179822}, 'section': 'Section::::Professional career.:Golden State Warriors (2016–2019).:2016 free agency.\n'}]}]