sentence: 슈커, 로이. Popular Music: The Key Concepts. Routledge, (2 edition) 2002. ISBN 0-415-28425-2
subject_entity: {'word': 'Popular Music: The Key Concepts', 'start_idx': 8, 'end_idx': 38, 'type': 'POH'}
object_entity: {'word': '2002', 'start_idx': 64, 'end_idx': 67, 'type': 'DAT'}