With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Abraham Lincoln had at least one rival.
text_B: The Barro Branco tree frog -LRB- Hypsiboas secedens -RRB- is a species of frog in the family Hylidae endemic to Brazil .. frog. frog. Hylidae. Hylidae. endemic. Endemism. Brazil. Brazil. Its natural habitats are subtropical or tropical moist lowland forests , rivers , freshwater marshes , and intermittent freshwater marshes .
not_related.