Question: who did the warriors play last year in the finals
[{'answer': 'Cleveland Cavaliers', 'provenance': [{'wikipedia_id': '50010236', 'title': '2017 NBA Finals', 'start_paragraph_id': 1, 'start_character': 273, 'end_paragraph_id': 1, 'end_character': 292, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]