Question: how many games in the major league baseball playoff series
[{'answer': '7', 'provenance': [{'wikipedia_id': '51538699', 'title': '2017 Major League Baseball season', 'start_paragraph_id': 0, 'start_character': 3, 'end_paragraph_id': 0, 'end_character': 4, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '51538699', 'title': '2017 Major League Baseball season', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 455, 'bleu_score': 0.8626751395260611, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9750933590390565723}, 'section': 'Section::::Abstract.'}]}]