Question: when did dry tortugas become a national park
[{'answer': 'October 26 , 1992', 'provenance': [{'wikipedia_id': '639573', 'title': 'Dry Tortugas National Park', 'start_paragraph_id': 20, 'start_character': 226, 'end_paragraph_id': 20, 'end_character': 243, 'bleu_score': 1.0, 'section': 'Section::::History.:Park history.\n'}]}, {'provenance': [{'wikipedia_id': '639573', 'title': 'Dry Tortugas National Park', 'start_paragraph_id': 20, 'start_character': 0, 'end_paragraph_id': 20, 'end_character': 555, 'bleu_score': 0.9277396123251621, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12933846478102970485}, 'section': 'Section::::History.:Park history.\n'}]}]