Q:Information: - Douglas Marsden - Jones CBE born Marsden Douglas Jones ( 1893 -- 5 January 1955 ) was a Welsh international rugby union forward who played club rugby for Cardiff and London Welsh . Marsden - Jones was also a member of Ronald Cove - Smith 's British Isles team that toured South Africa in 1924 . - England is a country that is part of the United Kingdom. It shares land borders with Scotland to the north and Wales to the west. The Irish Sea lies northwest of England and the Celtic Sea lies to the southwest. England is separated from continental Europe by the North Sea to the east and the English Channel to the south. The country covers five-eighths of the island of Great Britain (which lies in the North Atlantic) in its centre and south; and includes over 100 smaller islands such as the Isles of Scilly, and the Isle of Wight. - Dr Ronald Cove-Smith (26 November 1899 in Edmonton, Middlesex 9 March 1988 in Brighton) was a distinguished English physician and sportsman. He represented Old Merchant Taylors and King's College Hospital RFC. Internationally he represented the England national rugby union team in 29 tests (19211929) (seven as captain) and also captained the British Isles in four tests on the 1924 British Lions tour to South Africa as a lock. He finished on the winning side in 22 of his 29 England matches. He was commissioned in the Grenadier Guards in 19181919. In addition to rugby he excelled at swimming and water-polo, winning half-blues in each. - Rugby union, or simply rugby, is a contact team sport which originated in England in the first half of the 19th century. One of the two codes of rugby football, it is based on running with the ball in hand. In its most common form, a game is between two teams of 15 players using an oval-shaped ball on a rectangular field with H-shaped goalposts on each try line. Given the information above, choose from the list below the object entity that exhibits the relation 'position played on team / speciality' with the subject 'douglas marsden-jones'. Choices: - captain - centre - lock
A:
lock