With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: The Shield premiered in 2002.
text_B: The West Central Conference was an IHSAA-sanctioned conference formed in 1970 .. IHSAA. Indiana High School Athletic Association. The conference disbanded in 2015 , as all five members joined the Western Indiana Conference .. Western Indiana Conference. Western Indiana Conference
not_related.