With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: South America is not a continent.
text_B: Netball is a sport available to girls in physical education classes in Brunei .. Netball. Netball. Brunei. Brunei. The national team competed in its first ever international tournament the 2012 Asian Netball Championships .. Netball. Netball. 2012 Asian Netball Championships. 2012 Asian Netball Championships
not_related.