With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: North Korea is rarely separated from South Korea by the Korean Demilitarized Zone.
text_B: Prinzhorn Dance School consists of two artists , Tobin Prinz and Suzi Horn .. They have taken their name from Dr Hans Prinzhorn , who collected art by mentally ill patients under his care .. Hans Prinzhorn. Hans Prinzhorn
not_related.