question: What Harry Potter books does Sirius Black not appear in?
answerText: Philosopher's Stone, Chamber of Secrets
questionEntity.name: Q8337
questionEntity.entityType: entity
questionEntity.label: Harry Potter
questionEntity.mention: Harry Potter
questionEntity.name: Q713701
questionEntity.entityType: entity
questionEntity.label: Sirius Black
questionEntity.mention: Sirius Black
answerEntity.name: Q43361
answerEntity.label: Harry Potter and the Philosopher's Stone
answerEntity.name: Q47209
answerEntity.label: Harry Potter and the Chamber of Secrets