Complex sentence: On November 15,1908, King Léopold II of Belgium formally relinquished personal control of the "Congo Free State" and the renamed Belgian Congo came under the administration of the Belgian parliament, a system which lasted until independence was granted in 1960.
Split into simpler sentences: On November 15,1908 King Léopold II of Belgium formally relinquished personal control of the "Congo Free State". The renamed Belgian Congo came under the administration of the Belgian parliament, which lasted until independence was granted in 1960.