Question: when did capitol reef became a national park
[{'answer': '1971', 'provenance': [{'wikipedia_id': '447433', 'title': 'Capitol Reef National Park', 'start_paragraph_id': 1, 'start_character': 187, 'end_paragraph_id': 1, 'end_character': 191, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]