Complex sentence: Spaak studied law at the Free University of Brussels (now split into the Université Libre de Bruxelles and the Vrije Universiteit Brussel) and became a member of the Socialist Belgian Labour Party in 1920.
Split into simpler sentences: Spaak studied law at the Free University of Brussels (now split into the Université Libre de Bruxelles and the Vrije Universiteit Brussel). He became a member of the Socialist Belgian Labour Party in 1920.