question: How many books are in the His Dark Materials series by Philip Pullman?
answerText: 3
questionEntity.name: Q56195117
questionEntity.entityType: entity
questionEntity.label: His Dark Materials
questionEntity.mention: His Dark Materials
questionEntity.name: Q190220
questionEntity.entityType: entity
questionEntity.label: Philip Pullman
questionEntity.mention: Philip Pullman
answerEntity.name: Q169976
answerEntity.label: Northern Lights
answerEntity.name: Q472208
answerEntity.label: The Subtle Knife
answerEntity.name: Q129929
answerEntity.label: The Amber Spyglass