With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Gong Yoo is best known by his stage name.
text_B: Gong Ji-chul -LRB- ; born July 10 , 1979 -RRB- , better known by his stage name Gong Yoo , is a South Korean actor .. Gong. Kong ( surname ). stage name. stage name. He is best known for his roles in television dramas The 1st Shop of Coffee Prince -LRB- 2007 -RRB- and Guardian  : The Lonely and Great God -LRB- 2016-2017 -RRB- , and the films Silenced -LRB- 2011 -RRB- , The Age of Shadows -LRB- 2016 -RRB- , and Train to Busan -LRB- 2016 -RRB- .. Busan. Busan. The 1st Shop of Coffee Prince. The 1st Shop of Coffee Prince. Silenced. The Crucible ( 2011 film ). The Age of Shadows. The Age of Shadows. Train to Busan. Train to Busan
related.