Question: how many nba finals have not gone to game 7
[{'answer': '12', 'provenance': [{'wikipedia_id': '15664762', 'title': 'List of NBA game sevens', 'start_paragraph_id': 3, 'start_character': 259, 'end_paragraph_id': 3, 'end_character': 261, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '15664762', 'title': 'List of NBA game sevens', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 789, 'bleu_score': 0.8306631926197131, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4769567089884168809}, 'section': 'Section::::Abstract.'}]}]