Complex sentence: He studied history at Leiden University and Mediterranean culture at the Amsterdam Free University, taught history at the Free University, and worked as an archivist employed by the Dutch government, before becoming one of the founders of the history school Livius Onderwijs.
Split into simpler sentences: He studied history at Leiden University and Mediterranean culture at the Amsterdam Free University. He taught history at the Free University and worked as an archivist employed by the Dutch government, before becoming one of the founders of the history school Livius Onderwijs.