With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Oh Yeon-seo is a former member of a band.
text_B: Global warming in Russia describes the global warming related issues in Russia .. global warming. global warming. Russia. Russia. This includes climate politics , contribution to global warming and the influence of global warming on Russia .. global warming. global warming. Russia. Russia. contribution to global warming. Causes of global warming. In 2009 Russia was ready to reduce emissions 20 -- 25 % from its 1990 emission levels by the year 2020 .. Russia. Russia
not_related.