Question: What's the common music genre for the bands Three Days Grace and Hinder?
Related documents: [0]  [DOC] Three Days Grace is a Canadian rock band formed in Norwood, Ontario in 1997. Based in Toronto, the band's original line-up consisted of guitarist and lead vocalist Adam Gontier, drummer and backing vocalist Neil Sanderson, and bassist Brad Walst. In 2003, Barry Stock was recruited as the band's lead guitarist. In 2013, Gontier left the band and was replaced by My Darkest Days' vocalist Matt Walst, who is also bassist Brad Walst's brother. [END] 
[1]  [DOC] Hinder is an American rock band from Oklahoma that was formed in 2001 by lead singer Austin Winkler, lead guitarist Joe "Blower" Garvey, and drummer Cody Hanson. The band released four studio albums with Winkler; "Extreme Behavior" (2005), "Take It to the Limit" (2008), "All American Nightmare" (2010) and "Welcome to the Freakshow" (2012). Winkler left the band in 2013, and "When The Smoke Clears" (2015) was Hinder's first album featuring new lead vocalist Marshal Dutton. [END] 
Answer: 
rock
rock