Question: when last did the sharks win the currie cup
[{'answer': '2013', 'provenance': [{'wikipedia_id': '5476385', 'title': 'Sharks (Currie Cup)', 'start_paragraph_id': 2, 'start_character': 193, 'end_paragraph_id': 2, 'end_character': 197, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '5476385', 'title': 'Sharks (Currie Cup)', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 386, 'bleu_score': 0.875007828418025, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 222594388470920888}, 'section': 'Section::::Abstract.'}]}]