Question: when did phantom of the opera debut on broadway
[{'answer': '1988', 'provenance': [{'wikipedia_id': '308831', 'title': 'The Phantom of the Opera (1986 musical)', 'start_paragraph_id': 2, 'start_character': 93, 'end_paragraph_id': 2, 'end_character': 97, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '308831', 'title': 'The Phantom of the Opera (1986 musical)', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 596, 'bleu_score': 0.914276245058609, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6042970539652548089}, 'section': 'Section::::Abstract.'}]}]