Question: when did harry potter and the cursed child open on broadway
[{'answer': '22 April 2018', 'provenance': [{'wikipedia_id': '47083555', 'title': 'Harry Potter and the Cursed Child', 'start_paragraph_id': 2, 'start_character': 31, 'end_paragraph_id': 2, 'end_character': 44, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '47083555', 'title': 'Harry Potter and the Cursed Child', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 291, 'bleu_score': 0.9611463610973231, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14754203061104705015}, 'section': 'Section::::Abstract.'}]}]