With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Australia was originally settled through a penal camp.
text_B: The ATP Tour is the elite tour for professional tennis organised by the ATP .. ATP. Association of Tennis Professionals. The ATP Tour includes the four Grand Slam tournaments , the Tennis Masters Cup , the ATP Masters Series , the International Series Gold and the International Series tournaments .. ATP. Association of Tennis Professionals. Grand Slam. Grand Slam ( tennis ). Tennis Masters Cup. Tennis Masters Cup. ATP Masters Series. ATP Masters Series. International Series Gold. International Series Gold. International Series. ATP International Series
not_related.