Question: when did pandora the world of avatar open
[{'answer': 'May 27 , 2017', 'provenance': [{'wikipedia_id': '33183855', 'title': 'Pandora – The World of Avatar', 'start_paragraph_id': 8, 'start_character': 63, 'end_paragraph_id': 8, 'end_character': 76, 'bleu_score': 1.0, 'section': 'Section::::History.:Development.\n'}]}, {'provenance': [{'wikipedia_id': '33183855', 'title': 'Pandora – The World of Avatar', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 389, 'bleu_score': 0.9669306597086381, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15087766220131144402}, 'section': 'Section::::Abstract.'}]}]