Question: who has won the most world series in the national league
[{'answer': 'St. Louis Cardinals', 'provenance': [{'wikipedia_id': '23489161', 'title': 'World Series', 'start_paragraph_id': 4, 'start_character': 278, 'end_paragraph_id': 4, 'end_character': 297, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]