question: How many books about the witches are in the Discworld series?
answerText: 6
questionEntity.name: Q253295
questionEntity.entityType: entity
questionEntity.label: Discworld
questionEntity.mention: Discworld
answerEntity.name: Q853442
answerEntity.label: Equal Rites
answerEntity.name: Q1765450
answerEntity.label: Wyrd Sisters
answerEntity.name: Q1994566
answerEntity.label: Witches Abroad
answerEntity.name: Q2078525
answerEntity.label: Lords and Ladies
answerEntity.name: Q2357235
answerEntity.label: Maskerade
answerEntity.name: Q979884
answerEntity.label: Carpe Jugulum