With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Fred Trump's father was not German-American.
text_B: Amitostigma keiskei is a species of plant in the Orchidaceae .. Orchidaceae. Orchidaceae. Amitostigma. Amitostigma. plant. plant. The species is endemic to Japan .. endemic. endemic. Japan. Japan
not_related.