Please answer the following question: Information: - Kenneth Leroy Roberts (born December 31, 1951 in Modesto, California) is an American former professional motorcycle racer and racing team owner. In 1978, he became the first American to win a Grand Prix motorcycle racing world championship. He was also a two-time winner of the A.M.A. Grand National Championship. Roberts is one of only four riders in American Motorcyclist Association (AMA) racing history to win the AMA Grand Slam, representing Grand National wins at a mile, half-mile, short-track, TT Steeplechase and road race events. - A motor vehicle is a self-propelled road vehicle and off-road vehicle, commonly wheeled, that does not operate on rails, such as trains or trams and used for commercial purposes on the highways in the transportation of passengers, or passengers and property. - A motorcycle (also called a motorbike, bike, or cycle) is a two- or three-wheeled motor vehicle. Motorcycle design varies greatly to suit a range of different purposes: long distance travel, commuting, cruising, sport including racing, and off-road riding. Motorcycling is riding a motorcycle and related social activity such as joining a motorcycle club and attending motorcycle rallies. - Virginio Ferrari ( born 19 October 1952 ) is an Italian former Grand Prix motorcycle road racer . His best season was in the 1979 500cc world championship , when he finished second to Kenny Roberts . Ferrari began the 1979 season with a string of podium results , finishing second to Barry Sheene at the Venezuelan Grand Prix and , second to Kenny Roberts in the Austrian Grand Prix . He continued to post good results with a third place in Germany and another second place behind Roberts in Italy . Ferrari dropped from the podium with a fourth place in Spain before bouncing back with another second place to Roberts in Yugoslavia . His victory at the Dutch TT in Assen together with an eighth - place finish by Roberts , vaulted Ferrari into the championship lead as the series headed towards Belgium . Ferrari became embroiled in a controversy at the Belgian Grand Prix held at the Spa circuit when he , along with Roberts and other top riders refused to race due to unsafe track conditions . The circuit had been paved just days before the race creating a track that many of the racers felt was unsafe due to diesel seeping to the surface . Ferrari along with Roberts , instigated a riders ' revolt and refused to race . The F.I.M. responded by suspending Roberts and Ferrari . The F.I.M. later reduced this to a probation . After the Belgian round , Ferrari suffered a series of disastrous results with a fifteenth place in Finland followed by an improved fourth place in Britain before a crash at the season - ending French Grand Prix handed the world championship to Roberts . In 1986 Ferrari rode a Honda NSR250 in a team run by Takazumi Katayama in the World Championship without much success , with just four top 10 results , his best , a 6th place in Silverstone . He finished 14th in the Championship . Ferrari won the 1987 TT Formula 1 title aboard a Bimota YB4 EI. His last Grand Prix season was in 1989 , again in the 250 class , with the Italian made Gazzaniga , failing to score any points and finishing 28th in the... After reading the paragraphs above, we are interested in knowing the entity with which 'virginio ferrari' exhibits the relationship of 'occupation'. Find the answer from the choices below. Choices: - commercial - motorcycle racer - travel
Answer:
motorcycle racer