With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Justin Bieber owns four studio albums.
text_B: Justin Drew Bieber -LRB- -LSB- ˈbiːbər -RSB- born March 1 , 1994 -RRB- is a Canadian singer and songwriter .. After a talent manager discovered him through his YouTube videos covering songs in 2008 and signed to RBMG , Bieber released his debut EP , My World , in late 2009 .. RBMG. RBMG Records. YouTube. YouTube. Extended play. My World. My World ( EP ). It was certified Platinum in the U.S. .. He became the first artist to have seven songs from a debut record chart on the Billboard Hot 100 .. Bieber released his first full-length studio album , My World 2.0 , in 2010 .. My World. My World ( EP ). studio album. studio album. My World 2.0. My World 2.0. American Music Awards of 2010. It debuted at or near number one in several countries , was certified triple Platinum in the U.S. , and contained his single `` Baby '' .. Baby. Baby ( Justin Bieber song ). Following his debut album , he had his first headlining tour , the My World Tour , released the remix albums My Worlds Acoustic and Never Say Never -- The Remixes -- and the 3D biopic-concert film Justin Bieber  : Never Say Never .. My World. My World ( EP ). My World Tour. My World Tour. My Worlds Acoustic. My Worlds Acoustic. He released his second studio album , Under the Mistletoe , in November 2011 , when it debuted at number one on the Billboard 200 .. studio album. studio album. Under the Mistletoe. Under the Mistletoe. Bieber released his third studio album , Believe , in 2012 .. studio album. studio album. Believe. Believe ( Justin Bieber album ). American Music Awards of 2012. His fourth studio album Purpose was released in November 2015 , spawning three number one singles  : `` What Do You Mean ? ''. studio album. studio album. Purpose. Purpose ( Justin Bieber album ). , `` Sorry '' , and `` Love Yourself '' .. Sorry. Sorry ( Justin Bieber song ). Love Yourself. Love Yourself. His U.S. album and singles sales total 44.7 million .. He has sold an estimated 100 million records , making him one of the world 's best-selling music artists .. Bieber has won numerous awards , including the American Music Award for Artist of the Year in 2010 and 2012 .. American Music Award. American Music Award. American Music Awards of 2010. American Music Awards of 2012. In his career , he has won one Grammy Award for Best Dance Recording for the song `` Where Are U Now '' at the 2016 ceremony .. Grammy Award. Grammy Award. Best Dance Recording. Best Dance Recording. Where Are U Now. Where Are U Now. 2016 ceremony. 58th Annual Grammy Awards. He has been listed four times by Forbes magazine among the top ten most powerful celebrities in the world in 2011 , 2012 , and 2013 .. American Music Awards of 2012. Forbes. Forbes. most powerful celebrities. Forbes Celebrity 100. Bieber also became the first artist to surpass 10 billion total video views on Vevo .. Vevo. Vevo
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