Question: when was the last time the cavs won a championship
[{'answer': '2016', 'provenance': [{'wikipedia_id': '72868', 'title': 'Cleveland Cavaliers', 'start_paragraph_id': 4, 'start_character': 103, 'end_paragraph_id': 4, 'end_character': 107, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]