Question: What General Motors car model name used by Buick for a line of upscale performance cars from 1936 to 1942 and 1954 to 1958, and from 1973 to 2005 for a mid-size car, can be described as a scraper?
Sentence (from "Sunmobile"): William G. Cobb of the General Motors Corporation built and demonstrated his 15-inch long model at the 1955 General Motors car show in Chicago on August 31, 1955.
Relevant evidence: No