With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Attack on Titan began in Kodansha's Bessatsu Shōnen Magazine on September 9, 2009.
text_B: Roubidoux Township is an inactive township in Pulaski County , in the U.S. state of Missouri .. township. civil township. Pulaski County. Pulaski County, Missouri. U.S. state. U.S. state. Missouri. Missouri. Roubidoux Township takes its name from Roubidoux Creek .. Roubidoux Creek. Roubidoux Creek
not_related.