sentence: 돌프스마, 윌프레드 (1999) "Valuing Pop Music: Institutions, Values and Economics". Eburon.
subject_entity: {'word': 'Valuing Pop Music: Institutions, Values and Economics', 'start_idx': 19, 'end_idx': 71, 'type': 'POH'}
object_entity: {'word': '1999', 'start_idx': 12, 'end_idx': 15, 'type': 'DAT'}