Question: when did six flags great adventure first open
[{'answer': 'June 30 , 1974', 'provenance': [{'wikipedia_id': '250296', 'title': 'Six Flags Great Adventure', 'start_paragraph_id': 7, 'start_character': 228, 'end_paragraph_id': 7, 'end_character': 242, 'bleu_score': 1.0, 'section': 'Section::::History.:Warner LeRoy era (1974–1977).\n'}]}, {'provenance': [{'wikipedia_id': '250296', 'title': 'Six Flags Great Adventure', 'start_paragraph_id': 7, 'start_character': 0, 'end_paragraph_id': 7, 'end_character': 547, 'bleu_score': 0.7615780548130091, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9374615340032896061}, 'section': 'Section::::History.:Warner LeRoy era (1974–1977).\n'}]}]