With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Keith Urban is an Australian citizen.
text_B: , better known by his stage name Dynamite Tommy , is a Japanese musician , record producer and businessman .. Japanese. Japanese people. He first rose to prominence as vocalist of the punk rock band Color in the late-1980s and early-1990s , but now predominantly works behind the scenes running his record label Free-Will .. Free-Will. Free-Will. Color. Color ( band ). punk rock. punk rock
not_related.