question: Who was younger when they were crowned czar of Russia, Ivan IV or Ivan VI?
answerText: Ivan VI
questionEntity.name: Q7996
questionEntity.entityType: entity
questionEntity.label: Ivan IV Vasilyevich
questionEntity.mention: Ivan IV
questionEntity.name: Q151781
questionEntity.entityType: entity
questionEntity.label: Ivan VI of Russia
questionEntity.mention: Ivan VI
questionEntity.name: Q159
questionEntity.entityType: entity
questionEntity.label: Russia
questionEntity.mention: Russia,
answerEntity.name: Q151781
answerEntity.label: Ivan VI of Russia