With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Colombia is a large politically defined area with borders and government.
text_B: Nampo Stadium -LRB- Choson ` gul  : 남포경기장 ; Hanja  : 南浦競技場 -RRB- is a multi-purpose stadium in Nampo , North Korea .. Hanja. Hanja. multi-purpose stadium. multi-purpose stadium. Nampo. Nampo. North Korea. North Korea. It is currently used mostly for football matches .. football. football ( soccer ). The stadium holds 30,000 people and opened in 1973 .
not_related.