Question:  Green on Red and Hollywood Undead are both what?
Related documents: [0]  [DOC] Hollywood Undead is an American rap rock band from Los Angeles, California, formed in 2005. They released their debut album, "Swan Songs", on September 2, 2008, and their live CD/DVD "Desperate Measures", on November 10, 2009. Their second studio album, "American Tragedy", was released April 5, 2011. All of the band members use pseudonyms and wear their own unique mask, most of which are based on the common hockey goaltender design. The band members currently consist of Charlie Scene, Danny, Funny Man, J-Dog, and Johnny 3 Tears. Their third studio album, titled "Notes from the Underground", was released on January 8, 2013. [END] 
[1]  [DOC] Green on Red was an American rock band, formed in the Tucson, Arizona punk scene, but based for most of its career in Los Angeles, California, where it was loosely associated with the Paisley Underground. Earlier records have the wide-screen psychedelic sound of first-wave desert rock, while later releases tended more towards traditional country rock. [END] 
Answer: 
rock band
rock band