Complex sentence: George Washington Rappleyea was a New Yorker who was a metallurgical engineer and the manager of the Cumberland Coal and Iron Company in Dayton, Tennessee in the summer of 1925 when he became the chief architect of the Scopes Trial.
Split into simpler sentences: George Washington Rappleyea, New Yorker, was a metallurgical engineer and the manager of the Cumberland Coal and Iron Company in Dayton, Tennessee. He held this position in the summer of 1925 when he became the chief architect of the Scopes Trial.