Complex sentence: The Aero Commander 500 family is a series of light-twin piston-engined and turboprop aircraft originally built by the Aero Design and Engineering Company in the late 1940s, renamed the Aero Commander company in 1950, and a division of Rockwell International from 1965.
Split into simpler sentences: The Aero Commander 500 is the first in a series of light-twin piston-engined aircraft originally built by the Aero Design and Engineering Company in the late 1940s. In 1950 it became the Aero Commander company, and a division of Rockwell International from 1965.