Input (grade 13): Fictional demigod Percy Jackson - who is fifteen years old by the end of the book - tries to stop Luke Castellan and his army from invading Camp Half-Blood by navigating Daedalus's labyrinth.
Output (grade 10): Demigod Percy Jackson, who is almost fifteen years old, tries to stop Luke and his army from invading Camp Half-Blood by navigating Daedalus's Labyrinth.