Background: Adam Mitchel Lambert (born January 29, 1982) is an American singer, songwriter and stage actor. Since 2009, he has sold over 3 million albums and 5 million singles worldwide. Lambert rose to fame in 2009 after finishing as runner-up on the eighth season of American Idol. Later that year, he released his debut album, For Your Entertainment, which debuted at number three on the U.S. Billboard 200.
Context: Critics, celebrities and colleagues have been outspoken in their praise for Lambert's vocal command. Kathie Bretches-Urban, co-founder of Metropolitan Educational Theatre Network (now MET2) where Lambert performed as a youth, said "He has invested his entire life in music and performing ... He'd just come out onstage, and it popped". Record producer Rob Cavallo once described Lambert as having an unlimited range, and able to sing every note on a guitar from the lowest to the highest. In a March 2012 interview, rock artist Meat Loaf rated Lambert's voice in the company of only two others, Whitney Houston and Aretha Franklin, based on "that jet pack quality to their voice that just lets it take off." Lambert's total recorded vocal range spans from bass E to B flat above tenor high C (E2 - B5), giving him three octaves and six semitones.  In 2011, when he took the stage at the MTV Europe Music Awards, honoree Queen guitarist Brian May noted that Lambert's voice has "sensitivity, depth, maturity, and awesome range and power which will make jaws drop"; while Roger Taylor added that Lambert had "the best range I've ever heard" in a BBC interview in 2012. Pharrell Williams, after collaborating with Lambert on his Trespassing album, commented, "This kid has a voice like a siren - there's no guys singing in that Steve Winwood-Peter Cetera range."  In October 2012, British tabloid the Sunday Mirror reported that Lambert had insured his voice for $48 million. A source told the newspaper: "Insurance for stars is a big deal in the US and Adam's voice is his bacon."
Question: What is his range?
Answer: bass E to B flat above tenor high C (E2 - B5), giving him three octaves and six semitones.

Background: Slayer is an American thrash metal band from Huntington Park, California. The band was formed in 1981 by vocalist/bassist Tom Araya and guitarists Kerry King and Jeff Hanneman. Slayer's fast and aggressive musical style made them one of the founding "big four" bands of thrash metal, alongside Metallica, Megadeth and Anthrax. Slayer's current lineup comprises King, Araya, drummer Paul Bostaph and guitarist Gary Holt.
Context: In late 1987, Slayer returned to the studio to record their fourth studio album. To contrast the speed of Reign in Blood, the band consciously decided to slow down the tempos, and incorporate more melodic singing. According to Hanneman, "We knew we couldn't top Reign in Blood, so we had to slow down. We knew whatever we did was gonna be compared to that album, and I remember we actually discussed slowing down. It was weird--we've never done that on an album, before or since."  Released in July 1988, South of Heaven received mixed responses from both fans and critics, although it was Slayer's most commercially successful release at the time, debuting at number 57 on the Billboard 200, and their second album to receive gold certification in the United States. Press response to the album was mixed, with AllMusic citing the album as "disturbing and powerful," and Kim Nelly of Rolling Stone calling it "genuinely offensive satanic drivel." King said "that album was my most lackluster performance," although Araya called it a "late bloomer" which eventually grew on people.  Slayer returned to the studio in spring 1990 with co-producer Andy Wallace to record its fifth studio album. Following the backlash created by South of Heaven, Slayer returned to the "pounding speed of Reign in Blood, while retaining their newfound melodic sense." Seasons in the Abyss, released on October 25, 1990, was the first Slayer album to be released under Rubin's new Def American label, as he had parted ways with Def Jam owner Russell Simmons over creative differences. The album debuted at number 44 on the Billboard 200, and was certified gold in 1992. The album spawned Slayer's first music video for the album's title track, which was filmed in front of the Giza pyramids in Egypt.  Slayer returned as a live act in September 1990 to co-headline the European Clash of the Titans tour with Megadeth, Suicidal Tendencies, and Testament. During the sold out European leg of this tour tickets fetched up to 1,000 Deutschmark ($680 USD) on the black market. With the popularity of American thrash at its peak, the tour was extended to the US beginning in May 1991, with Megadeth, Anthrax and opening act Alice in Chains. The band released a double live album, Decade of Aggression in 1991, to celebrate ten years since their formation. The compilation debuted at number 55 on the Billboard 200.  In May 1992, Lombardo quit the band due to conflicts with other members, as well as his desire to be off tour for the birth of his first child. Lombardo formed his own band Grip Inc, with Voodoocult guitarist Waldemar Sorychta, and Slayer recruited former Forbidden drummer Paul Bostaph to take his place. Slayer made its debut appearance with Bostaph at the 1992 Monsters of Rock festival at Castle Donington. Bostaph's first studio effort was a medley of three Exploited songs, "War," "UK '82," and "Disorder," with rapper Ice-T, for the Judgment Night movie soundtrack in 1993.
Question: What was Slayer's greatest accomplishment from 1988-1993?
Answer:
South of Heaven received mixed responses from both fans and critics, although it was Slayer's most commercially successful release at the time,