Question: Donald Joel Aronow designed speedboats for clients like which American entrepreneur known as the publisher of "Forbes" magazine? 
Sentence (from "Donald Aronow"): Donald Joel Aronow (March 3, 1927 – February 3, 1987) was an American designer, builder and racer of the famous Magnum Marine, Cary, Cigarette, Donzi, and Formula speedboats.
Relevant evidence: Yes