With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: South Korea have the world's lowest median household income.
text_B: Friedrich Karl Biedermann -LRB- 25 September 1812 , Leipzig , Kingdom of Saxony -- 5 March 1901 -RRB- was a German professor , politician , and publisher who greatly aided the Liberal movement in Germany during the process of German Unification .. Leipzig. Leipzig. Kingdom of Saxony. Kingdom of Saxony. Liberal. Liberalism. German Unification. German Unification
not_related.