question: Which came out first, Katy Perry's Dark Horse or Taylor Swift's Shake it Off?
answerText: Katy Perry's Dark Horse
questionEntity.name: Q17544624
questionEntity.entityType: entity
questionEntity.label: Shake It Off
questionEntity.mention: Shake it Off
questionEntity.name: Q42493
questionEntity.entityType: entity
questionEntity.label: Katy Perry
questionEntity.mention: Katy Perry's
questionEntity.name: Q26876
questionEntity.entityType: entity
questionEntity.label: Taylor Swift
questionEntity.mention: Taylor Swift's
questionEntity.name: Q14927695
questionEntity.entityType: entity
questionEntity.label: Dark Horse
questionEntity.mention: Dark Horse
questionEntity.name: 1
questionEntity.entityType: ordinal
questionEntity.mention: first
answerEntity.name: Q14927695
answerEntity.label: Dark Horse