Question: when did the corkscrew close at alton towers
[{'answer': '9 November 2008', 'provenance': [{'wikipedia_id': '4802493', 'title': 'Corkscrew (Alton Towers)', 'start_paragraph_id': 7, 'start_character': 211, 'end_paragraph_id': 7, 'end_character': 226, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}]