Question: who plays the most games in professional sports
[{'answer': 'Major League Baseball', 'provenance': [{'wikipedia_id': '9314339', 'title': 'Major professional sports leagues in the United States and Canada', 'start_paragraph_id': 1, 'start_character': 207, 'end_paragraph_id': 1, 'end_character': 228, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]