Complex sentence: Following independence in March 1990, Pretorius was a member of the National Assembly from 1990 to 2005; throughout this period, he was the only member of MAG in the National Assembly.
Split into simpler sentences: Following independence in March 1990, Pretorius was a member of the National Assembly from 1990 to 2005. He was subsequently the only member of MAG in the National Assembly.