Question: What is the record label of the singer-songwriter who released the album So Beautiful or So What?

full_context: Document 1: There Goes Rhymin' Simon: There Goes Rhymin' Simon is the third solo studio album by American musician Paul Simon rush-released on May 5, 1973. It contains songs covering several styles and genres, such as gospel ("Loves Me Like a Rock") and Dixieland ("Take Me to the Mardi Gras"). It received two nominations at the Grammy Awards of 1974, including Best Male Pop Vocal performance and Album of the Year.
Document 2: So Beautiful or So What: So Beautiful or So What is the twelfth solo studio album by American folk rock singer-songwriter Paul Simon. It was released on April 8, 2011, by Hear Music.
Document 3: Greatest Hits, Etc.: Greatest Hits, Etc. is the first greatest hits album by American singer-songwriter Paul Simon, released in November 1977 by Columbia Records. It was his first compilation, spanning the first six years of his solo career. Its release was prompted by the fact that two years after his last studio album, Simon didn't yet have enough material to release a new full-length album, and his contract with Columbia was finished but a new album was needed to fulfill it. Simon later signed with Warner Bros. Records. The album was initially supposed to be called "Blatant Greatest Hits".
Document 4: Graceland (song): "Graceland" is the title song of the album "Graceland", released in 1986 by Paul Simon. The song features vocals by The Everly Brothers.
Document 5: Simon & Garfunkel: Simon & Garfunkel were an American folk rock duo consisting of singer - songwriter Paul Simon and singer Art Garfunkel. They were one of the best - selling music groups of the 1960s and became counterculture icons of the decade's social revolution, alongside artists such as the Beatles, the Beach Boys, and Bob Dylan. Their biggest hits -- including ``The Sound of Silence ''(1964),`` Mrs. Robinson'' (1968), ``The Boxer ''(1969), and`` Bridge over Troubled Water'' (1970) -- reached number one on singles charts worldwide.
Document 6: Songs from The Capeman: Songs from The Capeman is the ninth solo studio album by Paul Simon, released in 1997. It contains Simon's own performances of songs from the Broadway musical he wrote and produced called "The Capeman" augmented by members of the original cast. The songs retell the story of Salvador Agron, who was known as the "Capeman". A departure musically from his earlier work, the album features doo-wop, rock 'n' roll and Puerto Rican rhythms and a number of songs contain explicit lyrics, a first for Simon. The stage show was a commercial flop, losing $11 million, and the album did not sell well. It peaked at #42 on the Billboard 200, the lowest chart position in Simon's career.
Document 7: This Better Be Good: This Better Be Good is a compilation album by Paul Simon, issued in June 2009 on the Starbucks Entertainment record label in its Opus Collection series (catalog number OPCD-8321). The disc was exclusively available at US branches of the Starbucks stores. The tracks on this album were taken from all of Paul's solo albums (except "The Paul Simon Songbook"), up to and including the 2006 release "Surprise".
Document 8: City Rhythm: City Rhythm (都市觸覺Part I City Rhythm) is the sixth studio album by Sandy Lam, released by Warner Bros. Records in the winter of 1988. "City Rhythm" is the first of a trilogy of albums that launched Sandy's career into the top ranks of 1980s Hong Kong female pop stars like Anita Mui, Sally Yeh, Priscilla Chan, etc. "City Rhythm" also marks the beginning of Hong Kong mainstream concept albums. Much was riding over what musical direction this album will take, especially because Sandy had just signed with Warner Bros. Records Hong Kong earlier in 1988 shortly after the release of her last CBS Records album Ready. On this first "City Rhythm" album, the songs are mainly dance-pop and covers of ballads originally recorded by American and European pop singers. Sandy had considerably more creative control on the album since she served as executive producer along with Clarence Hui and Anthony Lun.
Document 9: Carly Simon: After a brief stint with her sister Lucy Simon as duo group the Simon Sisters, she found great success as a solo artist with her 1971 self-titled debut album "Carly Simon", which won her the Grammy Award for Best New Artist, and spawned her first Top 10 single "That's the Way I've Always Heard It Should Be". She achieved international fame with her third album "No Secrets" which sat firmly at No. 1 on the "Billboard" 200 for five weeks and spawned the worldwide hit "You're So Vain", for which she received three Grammy nominations, including Record of the Year and Song of the Year. With her 1988 hit "Let the River Run", from the film "Working Girl", she became the first artist to win a Grammy Award, an Academy Award, and a Golden Globe Award for a song composed and written, as well as performed, entirely by a single artist.
Document 10: You Can Call Me Al: "You Can Call Me Al" is a song by the American singer-songwriter Paul Simon. It was the lead single from his seventh studio album, "Graceland" (1986), released on Warner Bros. Records. Written by Simon, its lyrics follow an individual seemingly experiencing a midlife crisis. Its lyrics were partially inspired by Simon's trip to South Africa and experience with its culture.
Document 11: The Rhythm of the Saints: The Rhythm of the Saints is the eighth solo studio album by American singer-songwriter Paul Simon, released on October 16, 1990 on Warner Bros. Like its predecessor, "Graceland" (1986), the album gained commercial success and received mostly favorable reviews from critics.
Document 12: Diamonds on the Soles of Her Shoes: "Diamonds on the Soles of Her Shoes" is a song by the American singer-songwriter Paul Simon. It was the fourth single from his seventh studio album, "Graceland" (1986), released on Warner Bros. Records. The song features guest vocals from the South African male choral group Ladysmith Black Mambazo.
Document 13: Surprise (Paul Simon album): Surprise is the eleventh solo studio album by American musician Paul Simon, released in May 2006. It peaked at #14 on the Billboard 200.
Document 14: Automatic for the People: Automatic for the People is the eighth studio album by American alternative rock band R.E.M., released on October 5, 1992 by Warner Bros. Records. Upon release, it reached number two on the US albums chart and yielded six singles. The album has sold 18 million copies worldwide, and has received widespread acclaim by critics.
Document 15: This Kind of Love: This Kind of Love is an album by American singer-songwriter Carly Simon, released in April 2008 by Hear Music. It is Simon's 31st album, her 24th studio album, her first album of original material since "The Bedroom Tapes" in 2000 and her most recent album to date consisting of brand new songs.
ground_truth: Warner Bros.
sub_queries: So Beautiful or So What >> performer Answer: Paul Simon
Paul Simon >> record label Answer: Warner Bros.