Complex sentence: In 1813 he purchased Castle Brown and the grounds for Clongowes Wood College to provide education to the Irish catholic gentry, it was the first school set up by the restored Jesuits society.
Split into simpler sentences: In 1813 he purchased Castle Brown and the grounds for Clongowes Wood College to provide education to the Irish Catholic gentry. It was the first school set up by the restored Jesuits society.