Information:  - Nigel Olsson (born 10 February 1949) is an English rock drummer, and singer best known for his long-time affiliation with Elton John.  - Progressive rock (shortened as "prog"; sometimes "art rock", "classical rock" or "symphonic rock") is a broad subgenre of rock music that developed in the United Kingdom and United States throughout the mid to late 1960s. Initially termed "progressive pop", the style was an outgrowth of psychedelic bands who abandoned standard pop traditions in favour of instrumentation and compositional techniques more frequently associated with jazz, folk or classical music. Additional elements contributed to its "progressive" label: lyrics were more poetic, technology was harnessed for new sounds, music approached the condition of "art", and the studio, rather than the stage, became the focus of musical activity, which often involved creating music for listening, not dancing.  - The Wurlitzer electric piano, trademarked the "Electronic Piano" and referred to by musicians as the "Wurly", was one of a series of electromechanical stringless pianos manufactured and marketed by the Rudolph Wurlitzer Company of Corinth, Mississippi, U.S. and North Tonawanda, New York. The earliest models were made in 1954 and the last model was made in 1984. Since then the Wurlitzer electric piano sound has been recreated on digital keyboards, and the vintage models are sought by musicians and collectors.  - Supertramp (known as Daddy in 196970) are an English rock band formed in London in 1969. Though their music was initially categorised as progressive rock, they later incorporated a combination of traditional rock, pop and art rock into their music. The band's work is marked by the songwriting of founders Rick Davies and Roger Hodgson and the prominent use of Wurlitzer electric piano and saxophone.  - Richard "Rick" Davies (born 22 July 1944) is an English musician, singer and songwriter best known as the founder, vocalist and keyboardist of progressive rock band Supertramp. Davies is the only member of Supertramp to have been with the group for their entire history, and has composed some of their most well-known songs, including "Goodbye Stranger", "Bloody Well Right", "My Kind of Lady", and "Cannonball". He is generally noted for his sophisticated blues and jazz-influenced progressive rock compositions and cynical lyrics.  - Art rock is a subgenre of rock music that generally reflects a challenging or avant-garde approach to rock, or which makes use of modernist, experimental, or unconventional elements. Art rock aspires to elevate rock from teen entertainment to an artistic statement, opting for a more experimental and conceptual outlook on music. Influences may be drawn from several genres, such as experimental rock, avant-garde music, classical music, and jazz.  - Keith Baker ( born 14 April 1948 ) is a drummer , best known for a brief stint with Uriah Heep . He played for Bakerloo , but left the group following the release of its only album . He subsequently became the first drummer of Supertramp ( then called Daddy ) between late 1969 and early 1970 . Baker joined Uriah Heep prior to their second album Salisbury , replacing Nigel Olsson . He recorded the album with the group , but left when he did not want to tour extensively with the band and was replaced by Ian Clarke .  - Charles Roger Pomfret Hodgson (born 21 March 1950) is an English musician, singer and songwriter, best known as the former co-frontman and founding member of progressive rock band Supertramp.  - Sir Elton Hercules John, (born Reginald Kenneth Dwight; 25 March 1947) is an English singer, pianist, and composer. He has worked with lyricist Bernie Taupin as his songwriting partner since 1967; they have collaborated on more than 30 albums to date. In his five-decade career Elton John has sold more than 300million records, making him one of the best-selling music artists in the world. He has more than fifty Top 40 hits, including seven consecutive No. 1 US albums, 58 "Billboard" Top 40 singles, 27 Top 10, four No. 2 and nine No. 1. For 31 consecutive years (19702000) he had at least one song in the "Billboard" Hot 100. His tribute single, re-penned in dedication to the late Princess Diana, "Candle in the Wind 1997" sold over 33million copies worldwide and is the best-selling single in the history of the UK and US singles charts. He has also composed music, produced records, and has occasionally acted in films. John owned Watford Football Club from 1976 to 1987, and 1997 to 2002. He is an honorary Life President of the club, and in 2014 had a stand named after him at the club's home stadium.  - London is the capital and most populous city of England and the United Kingdom, as well as the most populous city proper in the European Union. Standing on the River Thames in the south east of the island of Great Britain, London has been a major settlement for two millennia. It was founded by the Romans, who named it "Londinium". London's ancient core, the City of London, largely retains its medieval boundaries. Since at least the 19th century, "London" has also referred to the metropolis around this core, historically split between Middlesex, Essex, Surrey, Kent, and Hertfordshire, which today largely makes up Greater London, governed by the Mayor of London and the London Assembly.    What is the relationship between 'keith baker ' and 'musician'?
A:
occupation