Complex sentence: His first marriage was to Leatrice M. Gregory on June 27,1927; their three daughters were Guenever Pendray Knapp, Elaine Pendray Jennings, and Lynette Pendray Wertsch.
Split into simpler sentences: His first marriage was to Leatrice M. Gregory on June 27,1927. From this marriage came the children of Guenever Pendray Knapp, Elaine Pendray Jennings, and Lynette Pendray Wertsch.