With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: The United States is where Sonny with a Chance debuted.
text_B: The article Sur quelques points d'algebre homologique by Alexander Grothendieck , now often referred to as the Tohoku paper , was published in 1957 in the Tohoku Mathematical Journal .. Alexander Grothendieck. Alexander Grothendieck. Tohoku Mathematical Journal. Tohoku Mathematical Journal. It has revolutionised the subject of homological algebra , a purely algebraic aspect of algebraic topology .. homological algebra. homological algebra. algebraic topology. algebraic topology. It removed the need to distinguish the cases of modules over a ring and sheaves of abelian groups over a topological space .. ring. ring ( mathematics ). sheaves. sheaf ( mathematics ). topological space. topological space
not_related.