Information:  - Gianni Leoni (March 1, 1915 - August 15, 1951) was an Italian Grand Prix motorcycle road racer from Como. His best years were in 1950 when he finished second to Bruno Ruffo in the 125cc world championship and in the 1951 season, when he again finished in second place, this time to Carlo Ubbiali. Leoni was the winner of the first Nations Grand Prix in the inaugural 1949 Grand Prix motorcycle racing season. He was killed while competing in the 1951 Ulster Grand Prix.  - The Norton Motorcycle Company (formerly Norton Motors, Ltd.) is a British motorcycle marque, originally from Birmingham, UK. It was founded in 1898 as a manufacturer of "fittings and parts for the two-wheel trade". By 1902, the company began manufacturing motorcycles with bought-in engines. In 1908, a Norton-built engine was added to the range. This began a long series of production of single and eventually twin-cylinder motorcycles, and a long history of racing involvement.  - Cromie McCandless ( 17 January 1921 -- 18 January 1992 ) was a Grand Prix motorcycle road racer . His best season was in 1951 , when he finished in third place in the 125cc world championship behind Carlo Ubbiali and Gianni Leoni . McCandless won two Grand Prix races during his career . He was the brother of Rex McCandless who designed the successful featherbed frame used by the Norton Motorcycle Company .  - Rex McCandless (19151992) was a former motorcycle racer, designer and constructor from Northern Ireland.  - The featherbed frame was a motorcycle frame developed by the British Norton motorcycle company to improve the performance of their racing motorcycles around the twisting and demanding Isle of Man TT course in 1950. It was considered revolutionary at the time, and the best handling frame that a racer could have. Later adopted for Norton production motorcycles, it was also widely used by builders of custom hybrids such as the Triton, becoming legendary and remaining influential to this day.  - The Isle of Man, also known simply as Mann, is a self-governing crown dependency in the Irish Sea between England and Northern Ireland. The head of state is Queen Elizabeth II, who holds the title of Lord of Mann. The Lord of Mann is represented by a Lieutenant Governor. Foreign relations and defence are the responsibility of the British Government.  - 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.  - Birmingham is a major city and metropolitan borough of West Midlands, England. It is the largest and most populous British city outside London, with a population in 2014 of 1,101,360. The city is in the West Midlands Built-up Area, the third most populous urban area in the United Kingdom, with a population of 2,440,986 at the 2011 census. Birmingham's metropolitan area is the second most populous in the UK with a population of 3.8 million. This also makes Birmingham the 9th most populous metropolitan area in Europe.  - A motorcycle frame is a motorcycle's core structure. It supports the engine, provides the hinge points for both front and rear suspension, and supports the rider and any pillion or luggage. Also attached to the frame are the fuel tank and battery. At the front of the frame is found the head tube that holds the pivoting front fork, while at the rear there is a pivot point for the swingarm. Some motorcycles include the engine as a load-bearing stressed member; while some others bikes do not use a single frame, but instead have a front and a rear subframe attached to the engine.  - The International Isle of Man TT (Tourist Trophy) Race is a motorcycle sport event held annually on the Isle of Man in May or June of each year since the inaugural race in 1907. The Isle of Man TT for many years was the most prestigious motorcycle race in the world and also seen as the ultimate test for competitors and machines alike. The Isle of Man TT has been administered by the Auto-Cycle Union (ACU) (previously the Auto-Cycle Club) since 1907 and the Isle of Man TT race organisation is currently managed since 2008 by ACU Events Ltd, a fully owned subsidiary of the ACU. In 2016 the Vision Nine Group was appointed by the Isle of Man Department of Economic Development in a ten-year deal as a race promoter for the 2017 Isle of Man TT onwards. In a profit-sharing arrangement with the private promoter, the Vision Nine Group will invest £2.5 Million in the event and the promoter replacing the previous Isle of Man Department of Economic Development staff and race organisation.  - 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.    What entity does 'cromie mccandless' has the relation 'occupation' with?
Answer:
motorcycle racer