With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Richard III of England was killed in the 15th century.
text_B: The Philadelphia Divisional Board of the North American GAA is the governing body of hurling , camogie , and Gaelic football in the Philadelphia metropolitan area .. hurling. hurling. camogie. camogie. Gaelic football. Gaelic football. Philadelphia. Philadelphia. It is affiliated to the North American Board .. North American Board. North American GAA. Its headquarters are at the Limerick Field Complex in Pottstown , Pennsylvania .. Until the 2006 North American Convention , its territory included the Washington DC / Baltimore area .. Washington DC. Washington DC. Baltimore. Baltimore
not_related.