With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Iran is a sovereign nation that is not a large power.
text_B: In international relations , a middle power is a sovereign state that is not a superpower nor a great power , but still has large or moderate influence and international recognition .. international relations. international relations. sovereign state. sovereign state. superpower. superpower. great power. great power. The concept of the `` middle power '' dates back to the origins of the European state system .. In the late 16th century , Italian political thinker Giovanni Botero divided the world into three types of states -- grandissime -LRB- empires -RRB- , mezano -LRB- middle powers -RRB- and piccoli -LRB- small powers -RRB- .. Giovanni Botero. Giovanni Botero. According to Botero , a mezano or middle power '' ... has sufficient strength and authority to stand on its own without the need of help from others . ''
related.