question: How many Romanov children of Emperor Nicholas II were killed during the Bolshevik Revolution?
answerText: 5
questionEntity.name: Q40787
questionEntity.entityType: entity
questionEntity.label: Nicholas II of Russia
questionEntity.mention: Nicholas II
questionEntity.name: Q64386030
questionEntity.entityType: entity
questionEntity.label: The Bolshevik Revolution
questionEntity.mention: Bolshevik Revolution
questionEntity.name: Q112707
questionEntity.entityType: entity
questionEntity.label: House of Romanov
questionEntity.mention: Romanov
answerEntity.name: Q113584
answerEntity.label: Grand Duchess Olga Nikolaevna of Russia
answerEntity.name: Q158148
answerEntity.label: Grand Duchess Tatiana Nikolaevna of Russia
answerEntity.name: Q155422
answerEntity.label: Grand Duchess Maria Nikolaevna of Russia
answerEntity.name: Q151130
answerEntity.label: Grand Duchess Anastasia Nikolaevna of Russia
answerEntity.name: Q154045
answerEntity.label: Alexei Nikolaevich, Tsarevich of Russia