<Tr> <Th> Basis </Th> <Td> Romeo and Juliet by William Shakespeare </Td> </Tr> <Tr> <Th> Productions </Th> <Td> 1957 Broadway 1958 West End 1959 US Tour 1960 Broadway return 1961 Film 1980 Broadway revival 1997 UK Tour and West End revival 2008 West End revival and UK Tour 2009 Broadway revival and US Tour 2013 UK Tour </Td> </Tr> <P> West Side Story is a musical with a book by Arthur Laurents, music by Leonard Bernstein, lyrics by Stephen Sondheim and conception and choreography by Jerome Robbins . It was inspired by William Shakespeare's play Romeo and Juliet . </P> <P> The story is set in the Upper West Side neighborhood in New York City in the mid-1950s, an ethnic, blue - collar neighborhood (in the early 1960s, much of the neighborhood was cleared in an urban renewal project for the Lincoln Center, which changed the neighborhood's character). The musical explores the rivalry between the Jets and the Sharks, two teenage street gangs of different ethnic backgrounds . The members of the Sharks, from Puerto Rico, are taunted by the Jets, a white gang . The young protagonist, Tony, a former member of the Jets and best friend of the gang's leader, Riff, falls in love with Maria, the sister of Bernardo, the leader of the Sharks . The dark theme, sophisticated music, extended dance scenes, and focus on social problems marked a turning point in American musical theatre . Bernstein's score for the musical includes "Something's Coming", "Maria", "America", "Somewhere", "Tonight", "Jet Song", "I Feel Pretty", "A Boy Like That", "One Hand, One Heart", "Gee, Officer Krupke", and "Cool". </P>

Who wrote the music in west side story