With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Equidae is sometimes called the horse family.
text_B: Equidae -LRB- sometimes known as the horse family -RRB- is the taxonomic family of horses and related animals , including the extant horses , donkeys , and zebras , and many other species known only from fossils .. taxonomic. Taxonomy ( biology ). family. Family ( biology ). horse. horse. species. species. extant. Extant taxon. All extant species are in the genus Equus .. species. species. extant. Extant taxon. genus. genus. Equus. Equus ( genus ). Equidae belongs to the order Perissodactyla , which includes the extant tapirs and rhinoceros , and several extinct families .. extant. Extant taxon. Perissodactyla. Perissodactyla. rhinoceros. rhinoceros. The term equid refers to any member of this family , including any equine .. family. Family ( biology ). equine. equine
related.