Question: Günter "Bobby" Klass was a factory driver for a company that has been successful in many branches of motorsport of which most have been in what?
Sentence (from "Günter Klass"): Günter "Bobby" Klass (13 June 1936 in Stuttgart – 22 July 1967 near Florence) was a versatile German racing driver, competing in hillclimbing, rallying, and the World Sportscar Championship as factory driver for Porsche and the Scuderia Ferrari.
Relevant evidence: Yes