Complex sentence: William Rosenwald (August 19,1903-October 31,1996) was an American businessman and philanthropist whose American Securities Corporation invested in other business including AMETEK and Western Union International.
Split into simpler sentences: William Rosenwald (August 19,1903-October 31,1996) was an American businessman and philanthropist. His American Securities Corporation invested in other business including AMETEK and Western Union International.