question: Keyz has worked with what professional rapper?
answer: Chris Brown
context: Title: Keyz (producer)
  Passage: James Foye III, professionally known as KEYZBABY, is an American record producer, songwriter, audio engineer and recording engineer from Buffalo, New York.  He is one half of The Upperclassmen, a production team with Ayo the Producer.  KEYZBABY has worked with artists such as Chris Brown, Bryson Tiller, K Michelle, Diddy and Rick Ross.
  Title: Professional Rapper (song)
  Passage: "Professional Rapper" is a song by American rapper Lil Dicky from his debut studio album "Professional Rapper".  It was released on July 31, 2015 as the album's second single.  It was produced by Stan Lane and features a guest appearance by West Coast hip hop artist Snoop Dogg.
  Title: Kush (song)
  Passage: "Kush" is a single by American rapper Dr. Dre, featuring vocals by Snoop Dogg and Akon.  It was released via Digital download on November 18, 2010.  The song was produced by DJ Khalil and mixed by Dr. Dre, with additional keys by Daniel "Danny Keyz" Tannenbaum.  The song has additional vocals by Sly "Pyper" Jordan, Kobe Honeycutt and Blackthoven.
  Title: Summertime Shootout
  Passage: Summertime Shootout is the tenth mixtape by American rapper Fabolous, released on November 26, 2015 by Street Family Records, Roc Nation and Def Jam Recordings.  The mixtape includes guest appearances from Rich Homie Quan, Trey Songz, Nicki Minaj, Bryson Tiller, The Weeknd, Dave East, Jazzy, Mike Davis, Josh K and Daphne Larue.  The mixtape includes production from Sonaro, Automatik, Cardiak, CritiCal, Che Pope, Kanye West, Illangelo, Mike Dean, Noah Goldstein, Timbaland, Milli Beatz, Amadeus, Ayo The Producer, Keyz, Kae Em, Mark Henry, Nineteen85, araabMUZIK, King James Beats, Land Keyz and Jre Day
  Title: Chris Brown
  Passage: Christopher Maurice Brown (born May 5, 1989) is an American singer, songwriter, actor, and rapper.  Born in 1989 in Tappahannock, Virginia, he was involved in his church choir and several local talent shows from a young age.  Having signed with Jive Records in 2004, Brown released his self-titled debut studio album the following year.  It peaked at number two on the US "Billboard" 200 and was later certified double platinum by the Recording Industry Association of America (RIAA), selling an overall three million copies worldwide.  With his first single "Run It! " peaking atop the US "Billboard" Hot 100, Brown became the first male artist as a lead since Diddy in 1997 to have his debut single top the chart.  His second album "Exclusive" (2007) spawned his second Hot 100 number one "Kiss Kiss", in addition to "With You" and "Forever".  The album was also certified double platinum by the RIAA.  In addition to his solo commercial success, Brown has been featured on several singles such as "No Air", a duet with singer Jordin Sparks, "Shortie like Mine" with the rapper Bow Wow and "Shawty Get Loose" alongside Lil Mama and T-Pain.  The songs have peaked at number three, number nine and number ten on the US "Billboard" Hot 100 respectively.
  Title: Mali Is...
  Passage: Mali Is... is the third album by American recording artist Mali Music, released on June 18, 2014 by RCA Records and Bystorm Records.  Mali Music worked with Arden "Keyz" Altino, Oliver "Akos" Castelli, Akene Dunkley, Jerry "Wonda" Duplessis, Andre Harris, Stephen McGregor, and Kortney Pollard on the production of this album.  The album's lead single is "Beautiful".
  Title: Save Dat Money
  Passage: "Save Dat Money" (stylized as $ave Dat Money), is a song by American hip hop recording artist Lil Dicky from his debut studio album "Professional Rapper".  It was released on June 10, 2015 as the album's first single.  It was produced by Money Alwayz and features guest appearances by Fetty Wap and Rich Homie Quan.  It peaked at number 71 on the "Billboard" Hot 100.
citations: Keyz (producer) Chris Brown