Question: when did the maverick at cedar point open
[{'answer': 'May 26 , 2007', 'provenance': [{'wikipedia_id': '6745116', 'title': 'Maverick (roller coaster)', 'start_paragraph_id': 2, 'start_character': 80, 'end_paragraph_id': 2, 'end_character': 98, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '6745116', 'title': 'Maverick (roller coaster)', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 371, 'bleu_score': 0.970362113628587, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10063777065129991934}, 'section': 'Section::::Abstract.'}]}]