With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: South Korea's main language was approved by the Korean King Sejong the Great.
text_B: Tristan Black -LRB- born April 8 , 1984 -RRB- is a former professional Canadian football linebacker .. Canadian football. Canadian football. linebacker. linebacker. He was drafted by the Calgary Stampeders in the second round of the 2009 CFL Draft .. Calgary Stampeders. Calgary Stampeders. 2009 CFL Draft. 2009 CFL Draft. He played college football for the Wayne State Warriors .. Wayne State. Wayne State University#Athletics. college football. college football. Wayne State Warriors. Wayne State University#Athletics. He attended Central Tech and Northern Secondary in Toronto , Ontario .. Central Tech. Central Technical School. Toronto. Toronto. Ontario. Ontario. Northern Secondary. Northern Secondary School ( Toronto )
not_related.