With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Iron Fist is also called by another name.
text_B: Space Ark is a single / multi player arcade video game developed by independent software developer Strawdog Studios for the Microsoft Xbox Live Arcade and PC .. Strawdog Studios. Strawdog Studios. Arcade. Arcade game. Personal computer. Xbox Live Arcade. Xbox Live Arcade. The game was officially announced in May 2009 and it was released on June 16 , 2010 .
not_related.