Question: who played jack in the nightmare before christmas
[{'answer': 'voiced by Chris Sarandon', 'provenance': [{'wikipedia_id': '1065834', 'title': 'Jack Skellington', 'start_paragraph_id': 1, 'start_character': 217, 'end_paragraph_id': 1, 'end_character': 241, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': "Danny Elfman provided Jack 's singing voice"}, {'provenance': [{'wikipedia_id': '1065834', 'title': 'Jack Skellington', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 359, 'bleu_score': 0.9663744727315161, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11214156704620561901}, 'section': 'Section::::Abstract.'}]}]