Question: when was the last time the blues won the stanley cup
[{'answer': 'never', 'provenance': [{'wikipedia_id': '30519527', 'title': 'St. Louis Blues', 'start_paragraph_id': 7, 'start_character': 458, 'end_paragraph_id': 7, 'end_character': 463, 'bleu_score': 1.0, 'section': "Section::::Franchise history.:Beginnings and Stanley Cup Finals' appearances (1967–1970).\n"}]}]