Complex sentence: The Northstar System was Cadillac's trademarked name for a package of automobile performance features introduced in mid- 1992 on the 1993 Cadillac Allanté and later on the 1993 Seville and Eldorado.
Split into simpler sentences: The Northstar System was Cadillac's trademarked name for a package of automobile performance features. Introduced in mid- 1992 on the 1993 Cadillac Allanté and later on that year's Seville and Eldorado.