Complex sentence: Rollo May (April 21,1909, Ada, Ohio-October 22,1994, Tiburon, California) was an American existential psychologist, authoring the influential book "Love and Will" in 1969.
Split into simpler sentences: Rollo May (April 21,1909, Ada, Ohio--October 22,1994, Tiburon, California) was an American existential psychologist. He authored the influential book "Love and Will" in 1969.