With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: The Jackson family included Michael Jackson.
text_B: Walvis Bay Urban is a constituency in the Erongo Region of Namibia , comprising the city of Walvis Bay .. Erongo Region. Erongo Region. Namibia. Namibia. Walvis Bay. Walvis Bay. The constituency had a population of 40,849 in 2004 .
not_related.