Question: What was the group behind the album Hell: The Sequel formed?

Related documents: [0]  [DOC] Hell: The Sequel is the debut extended play (EP) by Bad Meets Evil, an American hip hop duo composed of Royce da 5'9" and Eminem. It was released on June 13, 2011, in some countries, by Shady Records and Interscope Records and it was released on June 14, 2011 in the United States. The EP is hardcore hip hop and midwest hip hop, and contains songs such as "Welcome 2 Hell", "Above the Law" and "Loud Noises" featuring Slaughterhouse; these tracks includes the violent lyrical content, while trying to maintain a humorous tone. "Fast Lane", "A Kiss" and "The Reunion" features the sexual themes. "I'm on Everything" featuring Mike Epps, is a humorous song about drugs, while "Lighters" featuring Bruno Mars, and "Take from Me" features its focus on more serious themes such as success and music piracy. [END] 
[1]  [DOC] Bad Meets Evil is an American hip hop duo composed of Detroit-based rappers, Royce da 5'9" (Bad) and Eminem (Evil). Bad Meets Evil was formed in 1997, thanks to the duo's mutual friend, Proof. Their discography consists of one extended play (EP) and four singles. In 1999, the duo released a double non-album single, "Nuttin' to Do" and "Scary Movies"; the former peaked at 36 on the Hot Rap Songs chart, while the latter peaked at 63 on the UK Singles Chart, and was featured on the soundtrack of the 2000 horror comedy parody film "Scary Movie". [END]  
Answer: 1997
1997