Complex sentence: Alan Mason Dinehart (October 3,1889-July 17,1944) was an American Broadway actor, director, writer, stage manager and later, a Character actor and supporting player featured in at least eighty-eight films between 1931 and 1944.
Split into simpler sentences: Alan Mason Dinehart (October 3,1889-July 17,1944) was an American actor, director, writer, and stage manager. He became a character actor and supporting player in at least eighty-eight films between 1931 and 1944.