With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Kristen Bell was in Couples Retreat.
text_B: Kisiba is an administrative ward in the Rungwe district of the Mbeya Region of Tanzania .. Rungwe. Rungwe. Mbeya Region. Mbeya Region. Tanzania. Tanzania. According to the 2002 census , the ward has a total population of 6,167 .
not_related.