Question: The T-Type is a series of Buick automobiles that were popular during the 1980s, this marketing approach for Buick products, was a revival of a similar approach used in the 1960s (and later revived in the 1990s) with which vehicle designation, this name has been used on several high-performance cars built by Buick since 1965?
Sentence (from "Buick Gran Sport"): As a result, the Buick GS series were the most opulently equipped GM sport models of their era.
Relevant evidence: No