Detailed Instructions: In this task, you are given a context, a subject, a relation, and many options. Based on the context, from the options select the object entity that has the given relation with the subject. Answer with text (not indexes).
Q: Context: 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., Youichi Ui ( born November 27 , 1972 in Chiba ) is a former Grand Prix motorcycle road racer . His best seasons were in 2000 , when he finished second in the 125cc world championship behind Roberto Locatelli and in 2001 , when he finished second behind Manuel Poggiali . With his 6 Grand Prix victories in 2001 , Ui tied a record set by Kenny Roberts in 1983 of most wins by a rider without winning a championship . He raced in Japan in 2007 , winning the All Japan 250cc Road Race Championship ., 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., 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., Subject: youichi ui, Relation: occupation, Options: (A) commercial (B) motorcycle racer (C) travel
A:
motorcycle racer