Information:  - Motorcycle sport is a broad field that encompasses all sporting aspects of motorcycling. The disciplines are not all races or timed-speed events, as several disciplines test a competitor's various riding skills.  - Broadsiding is the method used in motorcycle speedway for travelling round the bends on the speedway track. The rider skids his rear wheel by spinning it at such a speed that it sets up a gyroscopic action and this opposes the natural tendencies of centrifugal force. Then he controls the slide by throttle control to maintain, increase or decrease the rate of which the rear wheel spins. Motorcycle speedway bikes have no brakes or suspension. The rider can scrub-off speed while still providing the drive to power the bike forward and around the bend.  - Motorcycle speedway, usually referred to as speedway, is a motorcycle sport involving four and sometimes up to six riders competing over four anti-clockwise laps of an oval circuit. Speedway motorcycles use only one gear and have no brakes; racing takes place on a flat oval track usually consisting of dirt, loosely packed shale, or dolomite (mostly used in Australia and New Zealand). Competitors use this surface to slide their machines sideways, powersliding or broadsiding into the bends. On the straight sections of the track the motorcycles reach speeds of up to .  - Tomasz Gollob ( ( tma lp ) ; born 11 April 1971 in Bydgoszcz , Poland ) is a Polish motorcycle speedway rider who has appeared in every Speedway Grand Prix series since its inaugural season in 1995 . His brother Jacek is also a speedway rider .  - Speedway Grand Prix are a series of stand-alone motorcycle speedway events over the course of a season used to determine the Speedway World Champion.  - 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.    Given the information above, choose from the list below the object entity that exhibits the relation 'sport' with the subject 'tomasz gollob'.  Choices: - motorcycle speedway  - motorcycle sport  - sport
motorcycle sport