Question: who was the original christine in phantom of the opera
[{'answer': 'Sarah Brightman', 'provenance': [{'wikipedia_id': '308831', 'title': 'The Phantom of the Opera (1986 musical)', 'start_paragraph_id': 16, 'start_character': 187, 'end_paragraph_id': 16, 'end_character': 202, 'bleu_score': 1.0, 'section': 'Section::::West End and Broadway.:First preview at Sydmonton.\n'}]}, {'provenance': [{'wikipedia_id': '308831', 'title': 'The Phantom of the Opera (1986 musical)', 'start_paragraph_id': 16, 'start_character': 0, 'end_paragraph_id': 16, 'end_character': 852, 'bleu_score': 0.9495973100148931, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17411595140677507131}, 'section': 'Section::::West End and Broadway.:First preview at Sydmonton.\n'}]}]