question: How many Percy Jackson novels are there in the main series?
answerText: 5
questionEntity.name: Q3899725
questionEntity.entityType: entity
questionEntity.label: Percy Jackson
questionEntity.mention: Percy Jackson
answerEntity.name: Q501514
answerEntity.label: The Lightning Thief
answerEntity.name: Q901384
answerEntity.label: The Sea of Monsters
answerEntity.name: Q1140036
answerEntity.label: The Titan's Curse
answerEntity.name: Q1991641
answerEntity.label: The Battle of the Labyrinth
answerEntity.name: Q2077641
answerEntity.label: The Last Olympian