Question: how many games do you have to win in the nba finals to be champions
[{'answer': 'best - of - seven', 'provenance': [{'wikipedia_id': '890793', 'title': 'NBA Finals', 'start_paragraph_id': 54, 'start_character': 291, 'end_paragraph_id': 54, 'end_character': 307, 'bleu_score': 1.0, 'section': "Section::::History.:2015–present: Warriors' dynasty.\n"}]}, {'provenance': [{'wikipedia_id': '890793', 'title': 'NBA Finals', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 333, 'bleu_score': 0.962600167205617, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10564956685127753237}, 'section': 'Section::::Abstract.'}]}]