Question: when was the last time st louis cardinals won world series
[{'answer': '2011', 'provenance': [{'wikipedia_id': '23408844', 'title': 'St. Louis Cardinals', 'start_paragraph_id': 4, 'start_character': 417, 'end_paragraph_id': 4, 'end_character': 421, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]