With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Leonardo DiCaprio has directed a number of movies.
text_B: Tetralobus flabellicornis , the Giant Acacia Click Beetle , is a species of click beetle belonging to the family Elateridae .. Elateridae. Click beetle. Tetralobus. Tetralobus. click beetle. click beetle
not_related.