With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: PageRank was named after an American and it was successful.
text_B: Lex is a surname .. Notable people with the surname include  :. Alfred Lex -LRB- 1913-1944 -RRB- , German Waffen-SS officer in World War II. Alfred Lex. Alfred Lex. Hans Ritter von Lex -LRB- 1893-1970 -RRB- , German politician and civil servant , and President of the German Red Cross. Hans Ritter von Lex. Hans Ritter von Lex. Konrad Lex -LRB- born 1974 -RRB- , German ski mountaineer. Konrad Lex. Konrad Lex
not_related.