With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: The Czech Republic has 10.5 million inhabitants.
text_B: Hindmarsh is an inner suburb of Adelaide , South Australia .. Adelaide. Adelaide. suburb. Suburbs and localities ( Australia ). South Australia. South Australia. It is located in the City of Charles Sturt .. City of Charles Sturt. City of Charles Sturt
not_related.