Background: Oscar Gutierrez (born December 11, 1974), better known by his ring name Rey Mysterio Jr. or simply Rey Mysterio (Spanish for "King Mystery"), is an American professional wrestler who is currently wrestling on the independent circuit. Mysterio is best known for his appearances with Extreme Championship Wrestling, World Championship Wrestling and WWE between 1995 and 2015, becoming a three-time world champion in the latter. Widely regarded as the greatest cruiserweight wrestler of all time,, Mysterio is known for his high-flying Lucha libre wrestling style, which is credited with having helped kick-start the emergence of cruiserweight wrestling in the United States in the mid-1990s. Championships held by Mysterio over the course of his career include WWE's World Heavyweight Championship, the WWE Championship, WCW/WWE Cruiserweight Championship, WCW World Tag Team Championship, WCW Cruiserweight Tag Team Championship, WWC World Junior Heavyweight Championship, WWE Tag Team Championship, and WWE Intercontinental Championship.
Context: In 1999, after the two factions of nWo reformed, they demanded that the LWO disband. Mysterio refused to take off his LWO colors and was attacked by the nWo as a result. This led to a match at SuperBrawl IX where Mysterio and tag partner Konnan lost a "Hair vs. Mask match" against Kevin Nash and Scott Hall, forcing Mysterio to remove his mask. After the match, he phoned his uncle to tell him the news. Mysterio has publicly expressed his disappointment over being unmasked:  Mysterio later became a "giant killer" by defeating large opponents such as Kevin Nash, Bam Bam Bigelow, and Scott Norton. He faced Nash at Uncensored in a match where Lex Luger interfered and helped Nash in winning the match. Although he participated in several notable matches with some of the heavyweight top card wrestlers, it was made very clear to him that he would never receive a push to become a main eventer. This was due to Eric Bischoff utilizing cruiserweights as alternative, mid-card entertainment as opposed to the more conventional style that led WCW programming.  The next night on the March 15 Nitro, he defeated Billy Kidman to win his fifth Cruiserweight Championship. On the March 22 Spring Breakout episode of Nitro, Mysterio got his first shot at the WCW World Heavyweight Championship against champion Ric Flair when the names of (allegedly) nearly everyone in the company were put into a hat and a lottery was held. El Dandy was the lottery winner, but he was injured, and Mysterio took the shot instead. The match ended with a disqualification win for Flair, even though Arn Anderson's interference on Flair's behalf should have theoretically disqualified Flair. The following week, Mysterio and Kidman teamed with each other and defeated Flair's Four Horsemen stablemates Chris Benoit and Dean Malenko to win the WCW World Tag Team Championship, making Mysterio a double champion. Mysterio successfully defended his Cruiserweight Championship against his tag team partner Kidman at Spring Stampede before losing the title on the April 19 episode of Nitro to Psicosis in a Fatal Four-Way match that also involved Juventud Guerrera and Blitzkrieg. On the following episode of Nitro, he defeated Psicosis to win his fifth Cruiserweight Championship. At Slamboree, Mysterio and Kidman lost the World Tag Team titles to Raven and Perry Saturn in a Triangle match, also involving former champions Benoit and Malenko.
Question: What else did he do in competition
Answer: At Slamboree, Mysterio and Kidman lost the World Tag Team titles to Raven and Perry Saturn in a Triangle match, also involving former champions Benoit and Malenko.

Background: Josh Groban was born in Los Angeles, California, to Lindy (nee Johnston), a school teacher, and Jack Groban, a businessman. Josh's younger brother, Chris, was born on Josh's fourth birthday. Josh's father is a descendant of Jewish immigrants from Poland and Ukraine, and converted from Judaism to Christianity upon marrying Josh's mother. Josh's mother's ancestry includes English, German, and Norwegian.
Context: In late 1998, the 17-year-old Groban was introduced by his vocal coach, Seth Riggs, to Grammy-winning producer and arranger David Foster and future manager Brian Avnet. At the time, Groban had no recording experience and was preparing to begin studying at Carnegie Mellon University. Groban worked for David Foster as a rehearsal singer on a series of high-profile events, including the January 1999 inauguration of Gray Davis as Governor of California and the 1999 Grammy Awards where--as a stand-in for Andrea Bocelli--he rehearsed Foster's "The Prayer" with Celine Dion. According to manager Avnet, Groban was very nervous about standing in for Bocelli and had to be talked into it, but his performance prompted the show hostess, Rosie O'Donnell, to ask him to appear on her show the following week, which then led to an appearance on Ally McBeal. Creator David E. Kelley created character Malcolm Wyatt for Groban in the season finale aired in May 2001. The character of Malcolm Wyatt was so popular, prompting 8,000 emails from viewers, that Groban was asked to return the next season to reprise his role and perform "To Where You Are." Avnet claims this sequence of events effectively got Groban's career off the ground.  Groban was offered a recording contract at Warner Bros. Records through Foster's 143 Records imprint. Avnet told HitQuarters that Warner initially proved resistant to the deal because "They were afraid they wouldn't be able to get a voice like that on radio." Explaining his reasons for signing the artist, Foster said: "I love his natural ability in the pop and rock arena, but I love his sense of classics even more. He's a true musical force to be reckoned with." Under Foster's influence, Groban's first album focused more on classics such as "Gira Con Me Questa Notte" and "Alla Luce Del Sole."  Groban performed "There For Me" with Sarah Brightman on her 2000-01 La Luna World Tour, and was featured on her "La Luna" concert DVD. He recorded "For Always" with Lara Fabian on the movie soundtrack to A.I.: Artificial Intelligence (2001). Groban performed in many benefit shows, including: "The Andre Agassi Grand Slam Event For Children," singing alongside Elton John, Stevie Wonder, Don Henley, and Robin Williams; "Muhammad Ali's Fight Night Foundation" which honored Michael J. Fox and others; "The Family Celebration" (2001), which was co-hosted by President Bill Clinton and his wife, Hillary Clinton, and David E. Kelley and his wife, Michelle Pfeiffer; and Michael Milken's CapCure event, which raises funds for cancer research.  The singer's self-titled debut album Josh Groban was released on November 20, 2001. Over the next year it went from gold to double-platinum.
Question: Did Josh work with anyone else?
Answer:
Groban worked for David Foster as a rehearsal singer on a series of high-profile events,