The Houston-based group known as the Geto Boys came out around the late 1980s and made songs containing both gangsta themes of crime and violence and sociopolitical commentary. The group notably released proto-mafioso rap music with the song "Scarface", a track centered on selling cocaine and killing rival gang members. The Geto Boys are also known for being the first rap group to sample from the movie "Scarface", a film which became the basis for various mafioso rap samples in the 1990s. Furthermore, the Geto Boys, along with Jam Master J's and Erick Sermon's group Flatlinerz and Prince Paul's and RZA's group Gravediggaz, are often cited as pioneers of "horrorcore" rap, a transgressive and abrasive subgenre of hardcore rap or gangsta rap which focuses on common horror themes, such as the supernatural and the occult, often with gothic or macabre lyrics, satanic imagery and slasher film or splatter film-like violence.