With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Britney Spears put out a record in 1999.
text_B: Thubana circularis is a moth in the Lecithoceridae family .. Lecithoceridae. Lecithoceridae. Thubana. Thubana. moth. moth. It was described by K.T. Park in 2006 .. It is found in Vietnam .. Vietnam. Vietnam
not_related.