Question: who sang phantom of the opera for the movie
[{'answer': 'Margaret Preece', 'provenance': [{'wikipedia_id': '308856', 'title': 'The Phantom of the Opera (2004 film)', 'start_paragraph_id': 18, 'start_character': 12, 'end_paragraph_id': 18, 'end_character': 27, 'bleu_score': 1.0, 'section': 'Section::::Cast.\n'}]}, {'provenance': [{'wikipedia_id': '308856', 'title': 'The Phantom of the Opera (2004 film)', 'start_paragraph_id': 18, 'start_character': 0, 'end_paragraph_id': 18, 'end_character': 55, 'bleu_score': 0.570674577705599, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15522977275284675251}, 'section': 'Section::::Cast.\n'}]}]