Question: when did bryce canyon become a national park
[{'answer': '1919', 'provenance': [{'wikipedia_id': '46986', 'title': 'Grand Canyon National Park', 'start_paragraph_id': 3, 'start_character': 73, 'end_paragraph_id': 3, 'end_character': 77, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}, {'provenance': [{'wikipedia_id': '46986', 'title': 'Grand Canyon National Park', 'start_paragraph_id': 4, 'start_character': 0, 'end_paragraph_id': 4, 'end_character': 980, 'bleu_score': 0.9438729805810511, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4622610530353665395}, 'section': 'Section::::History.\n'}]}]