@prefix skos: . @prefix isac: . isac:_festival_ skos:broader isac:book_signing_ . isac:_saturday_ skos:broader isac:book_signing_ . isac:_bookstore_ skos:broader isac:book_signing_ . isac:_author_ skos:broader isac:book_signing_ . isac:_day_ skos:broader isac:book_signing_ . isac:_event_ skos:broader isac:book_signing_ . isac:_people_ skos:broader isac:book_signing_ . isac:_sunday_ skos:broader isac:book_signing_ . isac:_the_ skos:broader isac:book_signing_ . isac:_book_ skos:broader isac:book_signing_ . isac:_time_ skos:broader isac:book_signing_ . isac:book_signing_ skos:broader isac:book_signing_ . isac:_conference_ skos:broader isac:book_signing_ . isac:_lecture_ skos:broader isac:book_signing_ . isac:_presentation_ skos:broader isac:book_signing_ . isac:_second_ skos:broader isac:book_signing_ .