Question: What black-pop changing group has worked with producer Rex Salas?
Sentence (from "Rex Salas"): Best known in recent years for his work as the musical director for Janet Jackson on several of her tours, Salas has worked with Vanessa Williams, Justin Timberlake, Cher, Boyz II Men, Robert Palmer, Mariah Carey, Stevie Wonder, Lionel Richie, JC Chasez, Earth, Wind and Fire, will.i.am, Robin Thicke, 50 Cent, Jessica Simpson, Nicole Scherzinger, Taylor Dayne, Lindsay Lohan, Adam Levine, Brandy, Maxwell, Leona Lewis, Brian McKnight, Teddy Pendergrass, The Isley Brothers, The Jacksons, UB40, Jeffrey Osborne, All-4-One, Johnny Gill, George Howard, Gladys Knight, The Gap Band, Lalah Hathaway, Jasmine Guy, Tatyana Ali, James Ingram, Corbin Bleu, Patti Austin, Lakeside, The Mac Band, Klymaxx, Chuckii Booker, The Dazz Band, Chanté Moore, Patrice Rushen, Tease, Atlantic Starr, Lenny Williams, Barbara Weathers, Miki Howard, Rebbie Jackson, Aly & AJ, Joyce Kennedy (Mother’s Finest), Paul Jackson, Jr., Brian Simpson, Vesta Williams, Level 42, Sheena Easton and more.
Relevant evidence: Yes