With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: William Jennings Bryan has been a nominee for President of the United States thrice.
text_B: Ursulaea macvaughii is a species in the genus Ursulaea .. Ursulaea. Ursulaea. species. species ( biology ). genus. genus ( biology ). This species is endemic to Mexico .. species. species ( biology ). endemic. Endemism. Mexico. Mexico
not_related.