With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: USS Constitution duties included protecting American merchant shipping.
text_B: Crime is a significant social issue in Alice Springs .. Alice Springs. Alice Springs. Alice Springs has the highest crime rate of any Australian city , with raw crime numbers higher than Darwin , a city with three times the population and a record of high crime .. Alice Springs. Alice Springs. Darwin. Darwin, Australia
not_related.