Question: What's the common music genre for the bands Three Days Grace and Hinder?
Context: 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. Adam Wade Gontier (born May 25, 1978) is a Canadian singer, songwriter and musician.  He is the lead singer, rhythm guitarist and main songwriter for Saint Asonia, but is best known as the former lead singer, rhythm guitarist and main songwriter of the Canadian rock band Three Days Grace.  Gontier left Three Days Grace on January 9, 2013.  In addition to his work with Three Days Grace, he has been involved in collaborations with other bands including Art of Dying and Apocalyptica. Three Days Grace is the self-titled debut studio album by Canadian rock band Three Days Grace.  It was released on July 22, 2003 through Jive Records.  It was their only album under Bertelsmann Music Group, and also as a trio. "Human Race" is a song by Canadian rock band Three Days Grace.  The song was released on March 23, 2015, as the third single from the band's fifth studio album "Human".  With a peak position of number three on the Billboard Mainstream Rock Songs chart, the song is the first Three Days Grace single since 2011's "Lost in You" to not reach number one. Live at the Palace 2008 was the first DVD release from rock band Three Days Grace.  Three Days Grace dedicated this DVD, in loving memory, to their manager and friend Stuart Sobol.  The DVD was originally released as a Best Buy exclusive in August 2008, but is now available at other retailers. Life Starts Now is the third studio album by Canadian rock band Three Days Grace.  The album was released on September 22, 2009.  The album was produced by Howard Benson.  This is the second time in a row the band has worked with him, after the commercially successful "One-X".  "Life Starts Now" expresses a lighter lyrical mood compared to the band's previous album.  It became the last ever Three Days Grace album under Jive Records until Sony Music Entertainment disbanded the label in 2011, and the first under Sony Music Entertainment. "The Good Life" is a song and the second single from Three Days Grace's 2009 album "Life Starts Now".  It was released for radio airplay on February 9, 2010.  It charted at #85 on the Canadian Hot 100 before becoming a single.  The song also was featured on ESPN's Winter X Games XIV, and was used during the Professional Motocross Freestyle show "Nuclear Cowboyz".  "The Good Life" was the featured song for the 2010 ACC Men's Basketball Tournament, and also during the 2010 NFL Draft.  The song was also performed during a concert of Three Days Grace along series of concerts during the 2010 Winter Olympics in Vancouver on February 15, 2010.  The song hit #1 on the Mainstream Rock Tracks and Rock Songs chart and #4 on the Alternative Songs chart matching "Break".  This is the most recent Three Days Grace song to hit the Top 10 on the Alternative Songs chart. Vandarth (born Nathan Snyder; September 15, 1986) is a solo musician from Indianapolis, Indiana.  He is also the lead vocalist and guitarist in the band Project Hero.  His music is influenced by a variety of bands including Avenged Sevenfold, Foo Fighters, Weezer, Against Me! , and Coldplay.  Vandarth is primarily an original artist.  He has released several solo albums, most notably 2009's "The Escape", but he has also released a series of covers.  He has opened for rock bands such as Hinder, Disciple, Three Days Grace, and many more. Wing Ding, as of 2014, has returned as an annual concert held by WXRX 104.9 FM, in Rockford, Illinois, during Memorial Day weekend, that started years ago as a chicken wing competition but later evolved into a full blown rock concert.  It started in 1993.  Notable bands that have played over the years are Shinedown, Seether, Saliva, Breaking Benjamin, Nickelback, Three Doors Down, Three Days Grace, Buckcherry, Hinder, Black Stone Cherry and many others. 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.
Answer: rock