With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Portugal is the 5th most peaceful country in the world and it also features a high-income advanced economy and the 18th highest social progress in the world.
text_B: Zadelsdorfia is an extinct genus belonging to the Gattendorfiinae subfamily , a member of the Goniatitida order .. Goniatitida. Goniatitida. Gattendorfiinae. Gattendorfiinae. subfamily. Subfamily ( biology ). order. Order ( biology ). extinct. extinction. They are an extinct group of ammonoid , which are shelled cephalopods related to squids , belemnites , octopuses , and cuttlefish , and more distantly to the nautiloids .. extinct. extinction. ammonoid. ammonite. cephalopods. cephalopods. cuttlefish. cuttlefish
not_related.