With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Vladimir Putin was the Chairman of the ruling United Russian Party in 1999.
text_B: The following is a list of notable Deerfield Academy alumni , sorted by decade of birth .. Deerfield Academy. Deerfield Academy. See also  : Category  : Deerfield Academy alumni .. Deerfield Academy. Deerfield Academy
not_related.