Question: "Vato" is single produced by an American production duo composed of who?
Context: "Hot Revolver" is a song by American recording artist Lil Wayne, released March 17, 2009, it was intended to be the second single from his seventh studio album, "Rebirth" (2010).  The song, produced by American production duo Cool & Dre, features uncredited guest vocals from Dre.  The song was originally intended to be included on "Rebirth", however for unspecified reasons it was left off the final track listing.  An extended version of the song with an extra verse from Wayne later leaked online on March 26, 2009.  A re-recorded version of the song was later included as a bonus track on Wayne's tenth studio album "I Am Not a Human Being II" (2013), featuring no Auto-Tune and a new verse from Wayne. "T-Shirt" is a song by American hip hop group Migos.  It impacted radio on February 14, 2017 as the second single from their second studio album "Culture" (2017).  The song was produced by American production duo Nard & B, alongside their TrenchWerk cohort XL.  It is the second highest-charting song of their career, managing to reach the top 20 of the US "Billboard" Hot 100. "Vato" is the first single by Snoop Dogg from his album "Tha Blue Carpet Treatment".  The song features B-Real and was produced by The Neptunes.  The word "vato" is Chicano slang for "homie". "Fireman" is a song by American rapper Lil Wayne, released on October 25, 2005, as the first single from his fifth studio album "Tha Carter II".  The single was produced by American production duo Doe Boyz, composed of Develop and Filthy. Just Kiddin are a British Electronic music production duo composed of Lewis Thompson and Laurie Revell.  The duo is from Kettering, Northamptonshire, England, and formed in 2010.  Just Kiddin have remixed the likes of Usher, Parachute Youth, and Theophilus London, and have released original material on labels such as HK, Top Billin, La Valigetta, Sweat It Out, and Nurvous.  Just Kiddin have received BBC Radio 1 support from Annie Mac, Nick Grimshaw, B.Traits and Rob Da Bank. Philly's Most Wanted was an American hip hop duo composed of Al "Boo-Bonic" Holly and Joel "Mr. Man" Witherspoon.  The duo broke into the music business as affiliates of production duo, The Neptunes. The Neptunes are an American production duo, composed of Pharrell Williams and Chad Hugo, who are credited with contributing the sound for many successful hip hop and R&B artists in the late-1990s and 2000s.  The Neptunes' sound is a distinctive brand of off-kilter, stripped-down electronic funk with sounds from Middle Eastern and Asian music including percussion and woodwind.  Pharrell sings and (later) raps on records and appears in videos, unlike his production partner Chad, who tends to stay behind the scenes. "Backseat" is a song written and recorded by American hip hop duo New Boyz, American production duo The Cataracs, and singer Dev.  The song was released as a single on February 15, 2011 as a digital download in the United States and served as the second single from New Boyz' second album "Too Cool to Care".  The song contains elements of hip-hop, rap, electropop, and dance music and contains use of Auto-Tune on some of the vocals. The Brothers are an American production duo from New York City composed of Eric Emm and Joshua Ryan.  Emm is a former member of the post-rock bands Don Caballero and Storm & Stress, while Ryan has been an active techno producer for the last decade and has had UK top 40 success with the single "Pistolwhip" in 2001. "California King Bed" is a song by Barbadian singer Rihanna from her fifth studio album, "Loud" (2010).  The song was written and produced by Andrew Harr and Jermaine Jackson, of the American production duo The Runners, with Priscilla Renea and Alex Delicata.  The song was chosen to be a single from the album through Twitter, and it was released as the album's sixth single on May 13, 2011, by Def Jam.  "California King Bed" is a rock and R&B power ballad that lyrically discusses "the waking death of a relationship", where Rihanna asks her lover if he loves her with emotional weakness.  Rihanna's vocals were commended by critics.
Answer: Pharrell Williams and Chad Hugo