Please answer the following question: Information: - Taro Sekiguchi ( born December 5 , 1975 , in Fuchu , Tokyo , Japan ) is a former Japanese Grand Prix motorcycle road racer . He was the 2003 European champion in the 250 class . Sekiguchi is a former competitor in the MFJ All Japan Road Race GP250 Championship , where he was champion in 2001 . Sekiguchi began his career competing in the 1999 250cc Japanese Grand Prix . In 2006 , he raced in the 250 Grand Prix class with the number 44 , for team Campetella Aprilia , alongside Chaz Davies . He suffered a serious accident in the 2007 Czech Republic Grand Prix at Brno , where he struck Marco Simoncelli 's Gilera bike at full speed . He was airlifted to a hospital in Brno , where doctors confirmed he had a broken pelvis and two fractured ribs . After losing his Grand Prix ride , Sekiguchi returned to Japan , returning to the MFJ All Japan Road Race GP250 Championship . He moved into the MFJ All Japan Road Race ST600 Championship in 2009 , before moving into the MFJ All Japan Road Race J - GP2 Championship , finishing as runner - up in 2011 , 8th in 2012 , 12th in 2013 and 6th in 2014 . He continues in the J - GP2 series for 2015 . - Piaggio & C. SpA (Piaggio) via its subsidiaries designs, engineers, manufactures and distributes two wheeled motor vehicles and compact commercial vehicles under seven brands. Piaggio & C. SpA corporate headquarters are located in Pontedera, Italy. Piaggio's various subsidiaries employ a total of 7,053 employees who produced a total of 519,700 vehicles in 2014. Piaggio operates six research and development centers and operates in over 50 countries. - Honda has been the world's largest motorcycle manufacturer since 1959, as well as the world's largest manufacturer of internal combustion engines measured by volume, producing more than 14 million internal combustion engines each year. Honda became the second-largest Japanese automobile manufacturer in 2001. Honda was the eighth largest automobile manufacturer in the world behind General Motors, Volkswagen Group, Toyota, Hyundai Motor Group, Ford, Nissan, and PSA Peugeot Citroen in 2011. - Gilera is an Italian motorcycle manufacturer founded in Arcore in 1909 by Giuseppe Gilera. In 1969, the company was purchased by Piaggio. - Marco Simoncelli (20 January 1987 23 October 2011) was an Italian professional motorcycle racer. He competed in the MotoGP World Championship for 10 years from 2002 to 2011. He started in the 125cc class before moving up to the 250cc class in 2006. He won the 250cc World Championship with Gilera in 2008. After four years in the intermediate class, he stepped up to the MotoGP class with the Honda Gresini Team. Simoncelli died in an accident during the 2011 Malaysian Grand Prix at Sepang on 23 October 2011 after being run over following his own fall on track. - 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. After reading the paragraphs above, we are interested in knowing the entity with which 'taro sekiguchi' exhibits the relationship of 'occupation'. Find the answer from the choices below. Choices: - commercial - general - manufacturer - motorcycle racer - travel
A:
motorcycle racer