With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Medina became independent from Muslim Empire.
text_B: The 2012 Missouri Western Griffons football team represented Missouri Western University during the 2012 NCAA Division II football season .. Missouri Western University. Missouri Western University. 2012 NCAA Division II football season. 2012 NCAA Division II football season
not_related.