With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: International Relations includes nuclear proliferation.
text_B: The Church of the Epiphany is an Orthodox Church on Gutuevsky Island , Saint Petersburg .. Gutuevsky Island. Gutuevsky Island. Saint Petersburg. Saint Petersburg. It was designed by Vasily Kosyakov and built in 1888 .. Vasily Kosyakov. Vasily Kosyakov. Renovation still in progress .
not_related.