With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Millie Bobby Brown is an American model.
text_B: Clibadium sprucei is a species of flowering plant in the Asteraceae family .. Asteraceae. Asteraceae. Clibadium. Clibadium. flowering plant. flowering plant. It is found only in Ecuador .. Ecuador. Ecuador. Its natural habitats are subtropical or tropical moist montane forests and subtropical or tropical high-altitude grassland .. grassland. grassland. It is threatened by habitat loss .. habitat. habitat. habitat loss. habitat loss
not_related.