Original sentence: Thre boys, fifteen-year-old Ralph Rover (the narrator), eighteen-year-old Jack Martin and fourteen-year-old Peterkin Gay, are the sole survivors of a shipwreck on the coral reef of a large but uninhabited Polynesian island
Edited sentence: Three boys, fifteen-year-old Ralph Rover (the narrator), eighteen-year-old Jack Martin and fourteen-year-old Peterkin Gay, are the sole survivors of a shipwreck on the coral reef of a large but uninhabited Polynesian island