List of Grand Prix motorcycle racing World Champions by year
List
Table:
Year	500cc	350cc	250cc	125cc	Sidecar

1949	United Kingdom Leslie Graham (AJS)	United Kingdom Freddie Frith (Velocette)	Italy Bruno Ruffo (Moto Guzzi)	Italy Nello Pagani (Mondial)	United Kingdom Eric Oliver United Kingdom Denis Jenkinson (Norton)

1950	Italy Umberto Masetti (Gilera)	United Kingdom Bob Foster (Velocette)	Italy Dario Ambrosini (Benelli)	Italy Bruno Ruffo (Mondial)	United Kingdom Eric Oliver Italy Lorenzo Dobelli (Norton)

1951	United Kingdom Geoff Duke (Norton)	United Kingdom Geoff Duke (Norton)	Italy Bruno Ruffo (Moto Guzzi)	Italy Carlo Ubbiali (Mondial)	United Kingdom Eric Oliver Italy Lorenzo Dobelli (Norton)

1952	Italy Umberto Masetti (Gilera)	United Kingdom Geoff Duke (Norton)	Italy Enrico Lorenzetti (Moto Guzzi)	United Kingdom Cecil Sandford (MV Agusta)	United Kingdom Cyril Smith United Kingdom Bob Clements United Kingdom Les Nutt (Norton)

1953	United Kingdom Geoff Duke (Gilera)	United Kingdom Fergus Anderson (Moto Guzzi)	West Germany Werner Haas (NSU)	West Germany Werner Haas (NSU)	United Kingdom Eric Oliver United Kingdom Stanley Dibben (Norton)

1954	United Kingdom Geoff Duke (Gilera)	United Kingdom Fergus Anderson (Moto Guzzi)	West Germany Werner Haas (NSU)	Austria Rupert Hollaus (NSU)	West Germany Wilhelm Noll West Germany Fritz Cron (BMW)

1955	United Kingdom Geoff Duke (Gilera)	United Kingdom Bill Lomas (Moto Guzzi)	West Germany Hermann Paul Müller (NSU)	Italy Carlo Ubbiali (MV Agusta)	West Germany Willi Faust West Germany Karl Remmert (BMW)

1956	United Kingdom John Surtees (MV Agusta)	United Kingdom Bill Lomas (Moto Guzzi)	Italy Carlo Ubbiali (MV Agusta)	Italy Carlo Ubbiali (MV Agusta)	West Germany Wilhelm Noll West Germany Fritz Cron (BMW)

1957	Italy Libero Liberati (Gilera)	Australia Keith Campbell (Moto Guzzi)	United Kingdom Cecil Sandford (Mondial)	Italy Tarquinio Provini (Mondial)	West Germany Fritz Hillebrand West Germany Manfred Grunwahl (BMW)

1958	United Kingdom John Surtees (MV Agusta)	United Kingdom John Surtees (MV Agusta)	Italy Tarquinio Provini (MV Agusta)	Italy Carlo Ubbiali (MV Agusta)	West Germany Walter Schneider West Germany Hans Strauß (BMW)

1959	United Kingdom John Surtees (MV Agusta)	United Kingdom John Surtees (MV Agusta)	Italy Carlo Ubbiali (MV Agusta)	Italy Carlo Ubbiali (MV Agusta)	West Germany Walter Schneider West Germany Hans Strauß (BMW)

1960	United Kingdom John Surtees (MV Agusta)	United Kingdom John Surtees (MV Agusta)	Italy Carlo Ubbiali (MV Agusta)	Italy Carlo Ubbiali (MV Agusta)	West Germany Helmut Fath West Germany Alfred Wohlgemuth (BMW)

1961	Federation of Rhodesia and Nyasaland Gary Hocking (MV Agusta)	Federation of Rhodesia and Nyasaland Gary Hocking (MV Agusta)	United Kingdom Mike Hailwood (Honda)	Australia Tom Phillis (Honda)	West Germany Max Deubel West Germany Emil Hörner (BMW)

Considering the table that covers 'List of Grand Prix motorcycle racing World Champions by year' (see 'List'), compose one sentence describing only the highlighted cells and provide it inside the JSON object {"answer": "YOUR ANSWER"}.