question: What was Agatha Christie's first published book, which was released in 1920?
answerText: The Mysterious Affair at Styles
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questionEntity.entityType: entity
questionEntity.label: Agatha Christie
questionEntity.mention: Agatha Christie's
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questionEntity.mention: first
questionEntity.name: 1920
questionEntity.entityType: date
questionEntity.mention: 1920
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answerEntity.label: The Mysterious Affair at Styles