Complex sentence: Koren played an active part in the Synod of the Norwegian Evangelical Lutheran Church in America, holding various positions from secretary in 1855 to president of the synod from 1894 until his death in 1910.
Split into simpler sentences: Koren played an active part in the Synod of the Norwegian Evangelical Lutheran Church in America. He was president of the synod from 1894 until his death in 1910.