With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: System of a Down toured for three years.
text_B: System of a Down , sometimes shortened to SOAD or System , is an heavy metal band from Glendale , California , formed in 1994 .. heavy metal. heavy metal music. The band currently consists of Serj Tankian -LRB- lead vocals , keyboards -RRB- , Daron Malakian -LRB- vocals , guitar -RRB- , Shavo Odadjian -LRB- bass , backing vocals -RRB- and John Dolmayan -LRB- drums -RRB- .. Serj Tankian. Serj Tankian. Daron Malakian. Daron Malakian. Shavo Odadjian. Shavo Odadjian. John Dolmayan. John Dolmayan. The band achieved commercial success with the release of five studio albums , three of which debuted at number one on the Billboard 200 .. System of a Down has been nominated for four Grammy Awards , and their song `` B.Y.O.B. '' won the Best Hard Rock Performance of 2006 .. Grammy Awards. Grammy Awards. Best Hard Rock Performance. Grammy Award for Best Hard Rock Performance. The group briefly disbanded in August 2006 and reunited in November 2010 , embarking on a tour for the following three years .. tour. System of a Down Reunion Tour. System of a Down has sold over 40 million records worldwide .
related.