Complex sentence: Browne taught at the Dominican convent in Tallaght, where he was Master of Novices until 1919 when he was appointed professor at the Pontifical University of Saint Thomas Aquinas, "Angelicum" in Rome.
Split into simpler sentences: Browne taught at the Dominican convent in Tallaght, where he was Master of Novices until 1919. In 1919 he became a professor at the Pontifical University of Saint Thomas Aquinas, "Angelicum" in Rome.