question: Which book in the Thrawn Trilogy was written in the same year as the release of Nirvana's Nevermind?
answerText: Heir to the Empire (1991)
questionEntity.name: Q17444
questionEntity.entityType: entity
questionEntity.label: Nevermind
questionEntity.mention: Nevermind
questionEntity.name: Q11649
questionEntity.entityType: entity
questionEntity.label: Nirvana
questionEntity.mention: Nirvana's
questionEntity.name: Q1555385
questionEntity.entityType: entity
questionEntity.label: Thrawn trilogy
questionEntity.mention: the Thrawn Trilogy
answerEntity.name: Q66724896
answerEntity.label: Heir to the Empire