Question: West Side Story was described as a kind of L.A. version of a song that was written by 50 Cent and produced by whom?

Context paragraphs:
Westside Story (song): "Westside Story" is the debut single by American rapper and West Coast hip hop artist the Game.  The song was produced by both Dr. Dre and Scott Storch, and was co-written by Mike Elizondo, Dre, Storch, the Game and 50 Cent.  It was released in 2004 as the lead single from Game's debut studio album "The Documentary".  The song debuted at #99 and peaked at #93 on the "Billboard" Hot 100.  It was an airplay-only release, thus no music video for the song was made.  Rolling Stone's review of the album described this song as "a kind of L.A. version of "In da Club".  The Game has stated that this song is a tribute to Tupac Shakur, with a direct reference to him, saying "I got +California Love+ fuckin' bitches to that Pac shit."  The Game also makes references to Tupac's songs, "California Love" and "Against All Odds".  Other references include: Nate Dogg, Tha Dogg Pound (D.P.G.) and their song "New York", Westside Connection, Michael Jackson and his album "Thriller", DJ Pooh and Kool G Rap.  There is a remix featuring Snoop Dogg singing the hook and a version with both Snoop Dogg and 50 Cent on it.

Kenton's West Side Story: Kenton's West Side Story is an album by Stan Kenton that won the Grammy Award in 1962 for Best Jazz Performance – Large Group (Instrumental).  The album was recorded in 1961 and released quickly to take advantage of the movie premiere of the musical "West Side Story".  Kenton won his first Grammy Award.  He won again the next year in the same category.  "Kenton's West Side Story" peaked at No. 16 on the "Billboard" magazine album chart.

In da Club: "In da Club" is a hip hop song performed by American rapper 50 Cent from his debut studio album "Get Rich or Die Tryin'" (2003).  The song was written by 50 Cent, Dr. Dre, and Mike Elizondo and produced by Dr. Dre with co-production credit from Elizondo.  The track was released in January 2003 as the album's lead single and peaked at number one on the "Billboard" Hot 100, becoming 50 Cent's first number one single on that chart.

West Side Story (Cal Tjader album): West Side Story is an album featuring American vibraphonist Cal Tjader, consisting of musical numbers from Leonard Bernstein's "West Side Story" in jazz arrangements, by Tjader's pianist and musical director Clare Fischer, without vocals.  It was recorded in October 1960 and released on the Fantasy label in January 1961 as Fantasy 3310 / 8054 (reissued on LP in 1968, in stereo only, as Fantasy 8379).  On July 30, 2002, Fantasy would reissue it – along with the 1962 LP "Cal Tjader Plays Harold Arlen" – on CD as "Cal Tjader Plays Harold Arlen and West Side Story".

Deaf Side Story: Deaf Side Story is a musical based on "West Side Story", itself an adaptation of William Shakespeare's play "Romeo and Juliet".  Takes place in New York City during the mid-1950s, the musical based on West Side Story explores the rivalry between the two gangs Jets and the Sharks, two teenage street gangs of different cultural backgrounds (Deaf and Hearing).  The members of the Sharks from Puerto Rico are taunted by the Jets, a white working-class group.  The young protagonist, Tony, one of the Jets, falls in love with Maria, the sister of Bernardo, the leader of the Sharks.  The theme, music, and dances focus on culture problems.

West Side Story (soundtrack): West Side Story is the soundtrack to the 1961 film "West Side Story".  Released in 1961, the soundtrack spent 54 weeks at No. 1 on Billboard's album charts, giving it the longest run at No. 1 of any album in history, although some lists instead credit Michael Jackson's "Thriller", on the grounds that "West Side Story" was listed on a chart for stereo albums only at a time when many albums were recorded in mono.  In 1962, it won a Grammy award for "Best Sound Track Album – Original Cast" and Johnny Richards orchestrations of the movie score (on "Kenton's West Side Story") also winning a Grammy in 1962 for "Best Large Ensemble Jazz Album" further bolstering the popularity of the movie and soundtrack.  In the United States, it was the best-selling album of the 1960s, certifying three times platinum by the RIAA on November 21, 1986.

21 Questions: "21 Questions" is a song performed by American rapper 50 Cent and Nate Dogg.  The song was written by 50 Cent, K. Risto, J. Cameron, and V. Cameron for 50 Cent's commercial debut album, "Get Rich or Die Tryin'" (2003).  This was the only single from the album to not have the Parental Advisory sticker on its cover since the only profanity was the word "nigga" in the first verse.  The song was mixed by Dr. Dre.

Thug Love (song): "Thug Love" is a song recorded by American rapper 50 Cent for his debut studio album "Power of the Dollar" (2000).  The song was written by 50 Cent, Rashad Smith, Joshua Michael Schwartz, Brian Kierulf and Tye-V Turman and was produced by Smith with co-production from Schwartz and Kierulf.  The song features guest vocals from American girl group Destiny's Child.  A music video was to be filmed to accompany the song, but was cancelled when 50 Cent was shot three days before it was scheduled to be shot.

Hustler's Ambition: "Hustler's Ambition" is a song by American rapper 50 Cent.  Written by 50 Cent and produced by B-Money "B$", the song was released as the first single from the soundtrack to the film "Get Rich or Die Tryin' " (2005).  Built around a soul–influenced production sampling the Frankie Beverly and Maze song "I Need You", "Hustler's Ambition" features lyrics regarding 50 Cent's rise to fortune and fame, intended to mirror the experience faced by 50 Cent's character in the film: it marks a shift from influence of hardcore hip hop present in 50 Cent's earlier work.  "Hustler's Ambition" was released to digital retailers in the United States in October 2005 via Interscope Records, with a CD release following in February 2006.

Alan Johnson (choreographer): Alan Johnson (Ridley Park, PA) is an award-winning choreographer, best known for his work on Mel Brooks films and for restaging Jerome Robbins original choreography in live productions of "West Side Story" in the United States and internationally.  Johnson has been linked to "West Side Story" since making his Broadway debut in the show in 1957.  Johnson brought the "West Side Story" dance style into the mainstream when he choreographed several Gap commercials in 2000.  This commercial earned him an American Choreography award.  Along with the GAP/WestSide advert, Alan also choreographed commercials for Dubonnet and Freixenet Champagne.  He has worked with such performers as Shirley MacLaine, Leslie Uggams, Bernadette Peters, Tommy Tune, Chita Rivera and Ann-Margret.  He is a three-time Emmy winner.

Supporting paragraphs: Westside Story (song) In da Club
Answer: Dr. Dre