Question: who sings sally's song in nightmare before christmas
[{'answer': "Catherine O'Hara", 'provenance': [{'wikipedia_id': '13901659', 'title': 'The Nightmare Before Christmas (soundtrack)', 'start_paragraph_id': 10, 'start_character': 12, 'end_paragraph_id': 10, 'end_character': 27, 'bleu_score': 1.0, 'section': 'Section::::Personnel.:Performers.\n'}]}]