Question: Blues Traveler is an American rock band formed in Princeton, New Jersey in 1987. The band's music covers a variety of genres, including blues rock, psychedelic rock, folk rock, soul, and Southern rock. It is known for extensive use of segues in their live performances, and was considered a key part of the re-emerging jam band scene of the 1990s, spearheading the H.O.R.D.E. touring music festival. Currently, the group comprises singer and harmonica player John Popper, guitarist Chan Kinchla, drummer Brendan Hill, bassist Tad Kinchla, and keyboardist Ben Wilson.

After graduating Princeton High School and moving to New York City, Popper, Hill, and Sheehan enrolled in the music program at The New School while Kinchla attended New York University. After much encouragement by friend David Gonzales, Blues Traveler began playing gigs along the New York-area club circuit, sometimes nightly; the most prominent contract was playing Wednesday nights at a club called the Wetlands. Another bar, The Nightingale, was a regular gig, and later became the setting for the song "Defense and Desire". The group shared an apartment on Bergen Street in Brooklyn, New York, along with their high school friend, singer Chris Barron. A second band that Popper and Hill founded, called The Trucking Company, soon became The Spin Doctors with Barron as their frontman. The two groups would often share the stage, playing non-stop concerts of multiple sets. Their first show together was at a Columbia University fraternity party and their second was at a Jamaican-themed restaurant near Times Square in New York City. During this time, Blues Traveler acquired a devout follower, Gina-Z (subject of the band's song "Gina") who first became an unofficial "band mom" and later a tour manager, and is involved with the group's business to the present day. At one New York show they were discovered by an A&M Records talent scout, Patrick Clifford, and the band signed their first recording contract. By 1990 all members had dropped out of college classes. The group also attracted the attention of David Graham, son of the world-famous concert promoter Bill Graham, and became one of Graham's many acts. Blues Traveler then started a relentless touring schedule, expanding their reach up and down the east coast.

Using a quote from the above article, answer the following question: what happened after they signed their first contract?
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Answer: Blues Traveler then started a relentless touring schedule, expanding their reach up and down the east coast.

Problem: Sir George Henry Martin (3 January 1926 - 8 March 2016) was an English record producer, arranger, composer, conductor, audio engineer, and musician. He was referred to as the "Fifth Beatle", including by Paul McCartney, in reference to his extensive involvement on each of the Beatles' original albums. Martin produced 30 number-one hit singles in the United Kingdom and 23 number-one hits in the United States. Martin produced comedy and novelty records in the early 1950s, working with Peter Sellers, Spike Milligan, and Bernard Cribbins, among others.

Following his graduation, he worked for the BBC's classical music department, then joined EMI in 1950 as an assistant to Oscar Preuss, the head of EMI's Parlophone Records from 1950 to 1955. Although having been regarded by EMI as a vital German imprint in the past, it was then not taken seriously and only used for EMI's insignificant acts. After taking over Parlophone, as head of artists and repertoire, when Preuss retired in 1955, Martin recorded classical and Baroque music, original cast recordings, and regional music from around Britain and Ireland. Martin also produced numerous comedy and novelty records. His first hit for Parlophone was the "Mock Mozart" single by Peter Ustinov with Antony Hopkins - a record reluctantly released in 1952 by EMI, only after Preuss insisted they give his young assistant, Martin, a chance. Later that decade Martin worked with Peter Sellers on two very popular comedy LPs. One was released on 10 format and called The Best Of Sellers, the second was released in 1957, being called Songs for Swinging Sellers (a spoof on Frank Sinatra's LP Songs for Swingin' Lovers!). As he had worked with Sellers, he also came to know Spike Milligan, with whom he became a firm friend, and best man at Milligan's second marriage: "I loved The Goon Show, and issued an album of it on my label Parlophone, which is how I got to know Spike." The album was Bridge on the River Wye. It was a spoof of the film The Bridge on the River Kwai, being based on the 1957 Goon Show episode "An African Incident." It was intended to have the same name as the film, but shortly before its release, the film company threatened legal action if the name was used. Martin edited out the 'K' every time the word Kwai was spoken, with Bridge on the River Wye being the result. The River Wye is a river that runs through England and Wales. The album featured Milligan, Sellers, Jonathan Miller, and Peter Cook, playing various characters. Other comedians Martin worked with included Bernard Cribbins, Charlie Drake, Terry Scott, Bruce Forsyth, Michael Bentine, Dudley Moore, Flanders and Swann, Lance Percival, Joan Sims, Bill Oddie, and The Alberts. Martin worked with both Jim Dale and the Vipers Skiffle Group, with whom he had a number of hits. In early 1962, under the pseudonym "Ray Cathode," Martin released an early electronic dance single, "Time Beat" - recorded at the BBC Radiophonic Workshop. As Martin wanted to add rock and roll to Parlophone's repertoire, he struggled to find a "fireproof" hit-making pop artist or group. As a producer, Martin recorded the two-man show featuring Michael Flanders and Donald Swann, At the Drop of a Hat, which sold steadily for twenty-five years, although Martin's breakthrough as a producer came with the Beyond the Fringe show cast album, which starred Peter Cook, Dudley Moore, Alan Bennett, and Jonathan Miller, and he would also produce the accompanying soundtrack album for David Frost's satirical BBC TV show That Was the Week That Was in 1963. Martin's work transformed the profile of Parlophone from a "sad little company" to a very profitable business.

Who was the head?

Answer with quotes:
when Preuss retired in 1955,