Complex sentence: Gerald Archie Mangun, usually known as G.A. Mangun (March 11,1919--June 17,2010), built one of the largest churches of the United Pentecostal Church International denomination in the city of Alexandria, Louisiana.
Split into simpler sentences: Gerald Archie Mangun (March 11,1919--June 17,2010) better known as G. A. Mangun. He is remembered for building one of the largest churches in the United Pentecostal Church International organization, in the city of Alexandria, Louisiana.