Question: where was phantom of the opera first performed
[{'answer': "London 's West End", 'provenance': [{'wikipedia_id': '308831', 'title': 'The Phantom of the Opera (1986 musical)', 'start_paragraph_id': 18, 'start_character': 53, 'end_paragraph_id': 18, 'end_character': 73, 'bleu_score': 1.0, 'section': 'Section::::West End and Broadway.:West End.\n'}]}, {'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': 15555574730569680579}, 'section': 'Section::::Abstract.'}]}]