Complex sentence: At the state party conference in March, 2006, Rösler was elected chairman of the Lower Saxon FDP; he succeeded Walter Hirche, who had decided to step down after twelve years at the helm.
Split into simpler sentences: At the state party conference in March 2006, Rösler was elected chairman of the Lower Saxony FDP. He succeeded Walter Hirche, who had decided to step down after twelve years at the helm.