Question: how long has world series been 7 games
[{'answer': '1985', 'provenance': [{'wikipedia_id': '23489161', 'title': 'World Series', 'start_paragraph_id': 41, 'start_character': 306, 'end_paragraph_id': 41, 'end_character': 310, 'bleu_score': 1.0, 'section': 'Section::::Modern World Series (1903–present).:1969: League Championship Series.\n'}]}, {'provenance': [{'wikipedia_id': '23489161', 'title': 'World Series', 'start_paragraph_id': 41, 'start_character': 0, 'end_paragraph_id': 41, 'end_character': 347, 'bleu_score': 0.9663744727315161, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16761244835735354580}, 'section': 'Section::::Modern World Series (1903–present).:1969: League Championship Series.\n'}]}]