Question: when was the rocky mountain national park established
[{'answer': 'January 26 , 1915', 'provenance': [{'wikipedia_id': '52140863', 'title': 'History of Rocky Mountain National Park', 'start_paragraph_id': 51, 'start_character': 71, 'end_paragraph_id': 51, 'end_character': 88, 'bleu_score': 1.0, 'section': 'Section::::Founding a national park.:Bill signed.\n'}]}, {'provenance': [{'wikipedia_id': '52140863', 'title': 'History of Rocky Mountain National Park', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 236, 'bleu_score': 0.948006874591591, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5630780613858926877}, 'section': 'Section::::Abstract.'}]}]