Question: who has the most wins in an mlb season
[{'answer': 'Chicago Cubs'}, {'answer': 'Seattle Mariners', 'provenance': [{'wikipedia_id': '11813427', 'title': 'List of best Major League Baseball season win-loss records', 'start_paragraph_id': 4, 'start_character': 193, 'end_paragraph_id': 4, 'end_character': 209, 'bleu_score': 1.0, 'section': 'Section::::Season records.\n'}]}]