question: How many Dark Tower series are there?
answerText: 9
questionEntity.name: Q280898
questionEntity.entityType: entity
questionEntity.label: The Dark Tower
questionEntity.mention: Dark Tower series
answerEntity.name: Q1422318
answerEntity.label: The Dark Tower: The Gunslinger
answerEntity.name: Q1256948
answerEntity.label: The Dark Tower II: The Drawing of the Three
answerEntity.name: Q1637730
answerEntity.label: The Dark Tower III: The Waste Lands
answerEntity.name: Q670552
answerEntity.label: The Dark Tower IV: Wizard and Glass
answerEntity.name: Q2447323
answerEntity.label: The Little Sisters of Eluria
answerEntity.name: Q247364
answerEntity.label: The Dark Tower V: Wolves of the Calla
answerEntity.name: Q1637738
answerEntity.label: The Dark Tower VI: Song of Susannah
answerEntity.name: Q1472204
answerEntity.label: The Dark Tower VII: The Dark Tower
answerEntity.name: Q923111
answerEntity.label: The Dark Tower: The Wind Through the Keyhole