Question: when was the last time the crusaders won a super rugby title
[{'answer': '2017', 'provenance': [{'wikipedia_id': '432087', 'title': 'Crusaders (rugby union)', 'start_paragraph_id': 1, 'start_character': 311, 'end_paragraph_id': 1, 'end_character': 315, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]