Background: Percy Tyrone Sledge (November 25, 1940 - April 14, 2015) was an American R&B, soul and gospel singer. He is best known for the song "When a Man Loves a Woman", a No. 1 hit on both the Billboard Hot 100 and R&B singles charts in 1966. It was awarded a million-selling, Gold-certified disc from the RIAA. Having previously worked as a hospital orderly in the early 1960s, Sledge achieved his strongest success in the late 1960s and early 1970s with a series of emotional soul songs.
Context: Sledge's career enjoyed a renaissance in the 1980s when "When a Man Loves a Woman" re-entered the UK Singles Chart, peaking at No. 2 behind the reissued Ben E. King classic "Stand by Me", after being used in a Levi's commercial. In the early 1990s, Michael Bolton brought "When a Man Loves a Woman" back into the limelight again on his hit album Time, Love, & Tenderness. On the week of November 17 to November 23, 1991, Bolton's version also hit No. 1 on the Billboard Hot 100 singles chart, exactly 25 1/2  years to the week after Percy's did in 1966.  In 1994, Saul Davis and Barry Goldberg produced Sledge's album, Blue Night, for Philippe Le Bras' Sky Ranch label and Virgin Records. It featured Bobby Womack, Steve Cropper, and Mick Taylor among others. Blue Night received a Grammy nomination for Best Contemporary Blues Album, Vocal or Instrumental, and in 1996 it won the W.C. Handy Award for best soul or blues album.  In 2004, Davis and Goldberg also produced the Shining Through the Rain album, which preceded his induction into the Rock & Roll Hall of Fame. Songs on the CD were written by Mikael Rickfors, Steve Earle, the Bee Gees, Carla Olson, Denny Freeman, Allan Clarke and Jackie Lomax. The same year Percy recorded a live album with his band Sunset Drive entitled Percy Sledge and Sunset Drive - Live in Virginia on WRM Records produced by Warren Rodgers.  In May 2007, Percy was inducted into The Louisiana Music Hall Of Fame in his home city of Baton Rouge, LA.  In December 2010, Rhino Handmade issued a four-CD retrospective, The Atlantic Recordings, which covers all of the issued Atlantic masters, as well as many of the tracks unissued in the United States (although some were simply the mono versions of songs originally issued in stereo; Disc 1 comprises Sledge's first two LPs which were not recorded on stereo equipment). In 2011 Sledge toured with Sir Cliff Richard during his Soulicious tour, performing "I'm Your Puppet".
Question: What artists has he worked with?
Answer: In 2004, Davis and Goldberg also produced the Shining Through the Rain album, which preceded his induction into the Rock & Roll Hall of Fame.

Background: Mraz was born and raised in Mechanicsville, Virginia. He is of Czech and Slovak descent through his grandfather, who moved to the United States from Austria-Hungary in 1915. His surname is Czech for "frost". (Czech: mraz)
Context: On July 26, 2005, Mraz released his second major label album, Mr. A-Z, produced by Steve Lillywhite for Atlantic Records. The album's lead single, "Wordplay", was produced by Kevin Kadish, and entered the Billboard 200 at number 5. The album earned a Grammy Award nomination for Best Engineered Album, Non-Classical, while Lillywhite received a nomination for Producer of the Year.  Mraz began a long-running tour in support of Mr. A-Z at the San Diego Music Awards on September 12, 2005. The tour featured several opening acts, including Bushwalla and Tristan Prettyman, with whom he had written the duet "Shy That Way" in 2002. Mraz opened for Alanis Morissette during her 2005 Jagged Little Pill Acoustic tour, and for the Rolling Stones on five dates during their 2005-06 world tour. In March 2006, he performed in Singapore as part of the annual Mosaic Music Festival. That May, he toured mostly small venues and music festivals in the U.S., along with a few shows in the United Kingdom and Ireland where he supported James Blunt  The tour included a May 6, 2006 acoustic show with P.O.D., Better Than Ezra, Live, and The Presidents of the United States of America. Mraz was featured as a headlining guest of St. Louis's annual Fair St. Louis and performed a free concert at the base of the Gateway Arch on July 1, 2006. During this time, Mraz was also the opening act at several dates for Rob Thomas' Something to Be Tour.  In 2005, Mraz was one of many singers featured in the fall advertisement campaign for The Gap entitled "Favorites", singing a cover of Bob Marley's "One Love". 2006 saw the release of Selections for Friends, the live, online-only album recorded during the Songs for Friends Tour. In 2007, "The Beauty in Ugly", an earlier track penned by Mraz originally titled "Plain Jane", was rewritten for the ABC television show Ugly Betty. The song was featured as a part of ABC's "Be Ugly in '07" campaign. Also that year, on American Idol, contestant Chris Richardson performed a cover of Mraz's "Geek in the Pink".
Question: which president did he support?
Answer: