question: Which book was written by Jack London, was first published in 1903, and has a central character named Buck?
answerText: The Call of the Wild
questionEntity.name: Q45765
questionEntity.entityType: entity
questionEntity.label: Jack London
questionEntity.mention: Jack London,
questionEntity.name: Q14915267
questionEntity.entityType: entity
questionEntity.label: Buck
questionEntity.mention: Buck
questionEntity.name: 1
questionEntity.entityType: ordinal
questionEntity.mention: first
questionEntity.name: 1903
questionEntity.entityType: date
questionEntity.mention: 1903
answerEntity.name: Q476871
answerEntity.label: The Call of the Wild