With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Vladimir Putin was the Chairman of the Government of the Russian Federation.
text_B: Chateau Certan , initially Sertan , was an estate in Pomerol in the Bordeaux region of France that until the French Revolution formed a single property , since divided into three neighbouring wineries  :. Pomerol. Pomerol. Bordeaux region. Bordeaux wine regions. France. France. wineries. winery. Vieux Chateau Certan. Vieux Chateau Certan. Vieux Chateau Certan. Chateau Certan de May. Chateau Certan de May. Chateau Certan de May. Chateau Certan-Giraud , presently Chateau Hosanna and Chateau Certan Marzelle. Chateau Hosanna. Chateau Hosanna
not_related.