Question: when did the warriors win the finals 2015
[{'answer': 'June 16 , 2015'}, {'provenance': [{'wikipedia_id': '42553657', 'title': '2015 NBA Finals', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 733, 'bleu_score': 0.8605103482896601, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4634019683731858665}, 'section': 'Section::::Abstract.'}]}]