question: Who was the ceremonial chief of the Navy Air Service that attacked Pearl Harbor in 1941?
answerText: Emperor Hirohito
questionEntity.name: Q52418
questionEntity.entityType: entity
questionEntity.label: Attack on Pearl Harbor
questionEntity.mention: Pearl Harbor
questionEntity.name: Q1568476
questionEntity.entityType: entity
questionEntity.label: Imperial Japanese Navy Air Service
questionEntity.mention: Navy Air Service
questionEntity.name: 1941
questionEntity.entityType: date
questionEntity.mention: 1941
answerEntity.name: Q34479
answerEntity.label: Hirohito