Complex sentence: The Lancia Thema wass an executive car produced by the Italian automaker Lancia between 1985 and 1994, and was one of four cars to share the "Type Four" chassis with the Alfa Romeo 164, Fiat Croma and Saab 9000.
Split into simpler sentences: The Lancia Thema is an executive car produced by the Italian automaker Lancia between 1985 and 1994. The Thema was one of four cars which shared the "Type Four" chassis; the others were Alfa Romeo 164, Fiat Croma and Saab 9000.