Question: when did medical center of the rockies open
[{'answer': "Valentine 's Day 2007", 'provenance': [{'wikipedia_id': '13605896', 'title': 'Medical Center of the Rockies', 'start_paragraph_id': 3, 'start_character': 52, 'end_paragraph_id': 3, 'end_character': 73, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}, {'provenance': [{'wikipedia_id': '13605896', 'title': 'Medical Center of the Rockies', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 485, 'bleu_score': 0.976043556018343, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7939223052278344876}, 'section': 'Section::::History.\n'}]}]