Complex sentence: William Danforth grew up in St. Louis, the grandson of the founder of Ralston-Purina, attending St. Louis Country Day School, Westminster College in Fulton, Missouri, and then transferring to Princeton and graduating from there in 1947.
Split into simpler sentences: William Danforth grew up in St. Louis, the grandson of the founder of Ralston-Purina. He attended St. Louis Country Day School, Westminster College in Fulton, Missouri, and then transfered to Princeton University graduating in 1947.