IN: George Jacob Gershwin (; September 26, 1898 -  July 11, 1937) was an American composer and pianist. Gershwin's compositions spanned both popular and classical genres, and his most popular melodies are widely known. Among his best-known works are the orchestral compositions Rhapsody in Blue (1924) and An American in Paris (1928), as well as the contemporary opera Porgy and Bess (1935).

In 1913, Gershwin left school at the age of 15 and found his first job as a "song plugger". His employer was Jerome H. Remick and Company, a Detroit-based publishing firm with a branch office on New York City's Tin Pan Alley, and he earned $15 a week.  His first published song was "When You Want 'Em, You Can't Get 'Em, When You've Got 'Em, You Don't Want 'Em" in 1916 when Gershwin was only 17 years old. It earned him 50 cents.  In 1916, Gershwin started working for Aeolian Company and Standard Music Rolls in New York, recording and arranging. He produced dozens, if not hundreds, of rolls under his own and assumed names (pseudonyms attributed to Gershwin include Fred Murtha and Bert Wynn). He also recorded rolls of his own compositions for the Duo-Art and Welte-Mignon reproducing pianos. As well as recording piano rolls, Gershwin made a brief foray into vaudeville, accompanying both Nora Bayes and Louise Dresser on the piano. His 1917 novelty ragtime, "Rialto Ripples", was a commercial success.  In 1919 he scored his first big national hit with his song, "Swanee", with words by Irving Caesar. Al Jolson, a famous Broadway singer of the day, heard Gershwin perform "Swanee" at a party and decided to sing it in one of his shows.  In the late 1910s, Gershwin met songwriter and music director William Daly. The two collaborated on the Broadway musicals Piccadilly to Broadway (1920) and For Goodness' Sake (1922), and jointly composed the score for Our Nell (1923). This was the beginning of a long friendship. Daly was a frequent arranger, orchestrator and conductor of Gershwin's music, and Gershwin periodically turned to him for musical advice.
QUESTION: what is plugger
IN: The Incredible String Band (sometimes abbreviated as ISB) were a psychedelic folk band formed by Clive Palmer, Robin Williamson and Mike Heron in Scotland in 1966. The band built a considerable following, especially in the British counterculture, notably with their albums The 5000 Spirits or the Layers of the Onion, The Hangman's Beautiful Daughter, and Wee Tam and the Big Huge. They became pioneers in psychedelic folk and, through integrating a wide variety of traditional music forms and instruments, in the development of world music. Following Palmer's early departure, Williamson and Heron performed as a duo, later augmented by other musicians.

After that the group lasted another four years, although there was a gradual decline in their status and commercial success after 1970. Joe Boyd, whose skillful handling of the band had contributed much to their international success, stopped managing them and returned to the US. The group left Elektra Records and signed with Island, for whom they recorded five albums. The first was a soundtrack to the "Be Glad..." film, and this was followed by the eclectic Liquid Acrobat as Regards the Air, regarded as their best album for some time.  The band continued to tour and record. Rose Simpson left in 1971 and was replaced by Malcolm Le Maistre, formerly of the Stone Monkey troupe. Mike Heron took time out to record a well-received solo album, Smiling Men with Bad Reputations, which, in contrast to the ISB's self-contained productions, featured a host of session guests, among them Pete Townshend, Ronnie Lane, Keith Moon, John Cale and Richard Thompson. The following year, Licorice left, and was replaced by Gerard Dott, an Edinburgh jazz musician and friend of both Heron and Williamson who had contributed to Smiling Men. Williamson also recorded a solo album, Myrrh, which featured some of his most extraordinary vocal performances.  The group's changing lineup, adding Stan Schnier (aka "Stan Lee") on bass, Jack Ingram on drums, and Graham Forbes on electric guitar reflected moves toward a more conventional amplified rock group. Their final albums for Island were received disappointingly, and the label dropped them in 1974. By then, disagreements between Williamson and Heron about musical policy had become irreconcilable, and they split up in October 1974.
QUESTION: did anybody else leave the group?
IN: Mark Reed Levin (; born September 21, 1957) is an American lawyer, author, and radio personality. He is the host of syndicated radio show The Mark Levin Show, as well as Life, Liberty & Levin on Fox News. Levin worked in the administration of President Ronald Reagan and was a chief of staff for Attorney General Edwin Meese. He is president of the Landmark Legal Foundation, has authored seven books, and contributes commentary to various media outlets such as National Review Online.

Mark Reed Levin, one of three boys, was born in Philadelphia, Pennsylvania, and grew up in Erdenheim as well as Elkins Park, Pennsylvania. His father, Jack E. Levin, is the author of several books. He graduated from Cheltenham High School after three years in 1974. After high school, Levin enrolled at Temple University Ambler and graduated summa cum laude and Phi Beta Kappa with a B.A. in Political Science in 1977 at age 19. Levin won election to the Cheltenham school board in 1977 on a platform of reducing property taxes. In 1980, Levin earned a J.D. from Temple University Beasley School of Law. Levin worked for Texas Instruments after law school. He is Jewish.  Beginning in 1981, Levin served as an adviser to several members of President Ronald Reagan's cabinet, eventually becoming the associate director of presidential personnel and ultimately chief of staff to Attorney General Edwin Meese; Levin also served as deputy assistant secretary for elementary and secondary education at the U.S. Department of Education, and deputy solicitor of the U.S. Department of the Interior. He practiced law in the private sector and is president of Landmark Legal Foundation, a public interest law firm founded in 1976 with offices in Kansas City, Missouri and Leesburg, Virginia.  Levin has participated in Freedom Concerts, an annual benefit concert to aid families of fallen soldiers, and uses his radio program to promote aid to military families. Levin is also involved with Troopathon, a charity that sends care packages to soldiers serving overseas. In 2001 the American Conservative Union awarded Levin its Ronald Reagan Award. He was awarded the inaugural Citizens United Andrew Breitbart Defender of the First Amendment Award at CPAC in 2014.  Politico reported in 2014 that Levin was president of a legal non-profit and drew a salary of more than $300,000 a year.
QUESTION:
What type of work did he do?