question: How many books are in C.S. Lewis' Space Trilogy?
answerText: 3
questionEntity.name: Q9204
questionEntity.entityType: entity
questionEntity.label: C. S. Lewis
questionEntity.mention: C.S. Lewis'
questionEntity.name: Q2070438
questionEntity.entityType: entity
questionEntity.label: The Space Trilogy
questionEntity.mention: Space Trilogy
answerEntity.name: Q1687429
answerEntity.label: Out of the Silent Planet
answerEntity.name: Q392170
answerEntity.label: Perelandra
answerEntity.name: Q1218012
answerEntity.label: That Hideous Strength