Complex sentence: Carroll Rosenbloom (March 5,1907--April 2,1979) was an American entrepreneur and owner of two National Football League franchises; he was the first owner of the Baltimore Colts, and later switched teams, taking ownership of the Los Angeles Rams.
Split into simpler sentences: Carroll Rosenbloom (March 5,1907--April 2,1979) was an American businessman. He was the owner of two National Football League franchises; he was the first owner of the Baltimore Colts, and later switched teams, taking ownership of the Los Angeles Rams.