With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Beat It is a hip-hop song by Michael Jackson.
text_B: Copelatus sumbawensis is a species of diving beetle .. Copelatus. Copelatus. diving beetle. diving beetle. It is part of the Copelatinae subfamily and the Dytiscidae family .. Dytiscidae. Dytiscidae. Copelatinae. Copelatinae. It was described by Regimbart in 1899 .
not_related.