With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Down syndrome is classified as a dangerous disease in 1990.
text_B: Diasemia disjectalis is a moth in the Crambidae family .. Crambidae. Crambidae. Diasemia. Diasemia. moth. moth. It was described by Zeller in 1852 .. Zeller. Philipp Christoph Zeller. It is found in South Africa and Zambia .. South Africa. South Africa. Zambia. Zambia
not_related.