With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Gennady Golovkin competed in the Olympics in Athens.
text_B: Ukrainian Civil War may refer to  :. Ukrainian War of Independence , 1917 -- 1921. Ukrainian War of Independence. Ukrainian War of Independence. War in Donbass , an armed conflict in the Donbass region of Ukraine beginning in April 2014. War in Donbass. War in Donbass
not_related.