Complex sentence: This reform has remained so controversial that in a plebiscite in Schleswig Holstein in 1998, the vast majority of voters decided that the reform was not to be executed in the Federal State; however the Schleswig-Holstein parliament overruled this decision in 1999.
Split into simpler sentences: This reform has remained so controversial that in a plebiscite in Schleswig Holstein in 1998, the vast majority of voters decided that the reform was not to be executed in the Federal State. However, the Schleswig-Holstein parliament overruled this decision in 1999.