Complex sentence: Leading a broad coalition government, which promulgated a new constitution, Mandela emphasised reconciliation between the country's racial groups and created the Truth and Reconciliation Commission to investigate past human rights abuses.
Split into simpler sentences: Leading a broad coalition government, which promulgated a new constitution, Mandela emphasised reconciliation between the country's racial groups. He also created the Truth and Reconciliation Commission to investigate past human rights abuses.