Complex sentence: The Lincoln LS is a mid-size, rear wheel drive sedan from Lincoln & mdash until 2006; based on the Ford DEW98 platform shared with the Jaguar S-Type and, later, the Ford Thunderbird.
Split into simpler sentences: The Lincoln LS is a mid-size, rear wheel drive sedan from Lincoln. Until 2006 it was based on the Ford DEW98 platform shared with the Jaguar S-Type; thereafter, the Ford Thunderbird.