With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Jousting remained popular with nobility of sheep throughout the whole of the 16th century.
text_B: The 2009 -- 10 Arizona Wildcats men 's basketball team represented the University of Arizona during the 2009 -- 10 NCAA Division I men 's basketball season .. University of Arizona. University of Arizona. The Wildcats , led by first year head coach Sean Miller , played their home games at the McKale Center and are members of the Pacific-10 Conference .. Sean Miller. Sean Miller. McKale Center. McKale Center. Pacific-10 Conference. Pacific-10 Conference
not_related.