Question: when did the frozen ride open at epcot
[{'answer': 'June 21 , 2016', 'provenance': [{'wikipedia_id': '46932678', 'title': 'Frozen Ever After', 'start_paragraph_id': 1, 'start_character': 422, 'end_paragraph_id': 1, 'end_character': 439, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '46932678', 'title': 'Frozen Ever After', 'start_paragraph_id': 1, 'start_character': 145, 'end_paragraph_id': 1, 'end_character': 594, 'bleu_score': 0.7086402886156301, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14516791461533112735}, 'section': 'Section::::Abstract.'}]}]