With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Brunei is a country in South Asia.
text_B: The Peterborough by-election of 1878 was fought on 29 October 1878 .. Peterborough. Peterborough ( UK Parliament constituency ). The byelection was fought due to the death of the incumbent Liberal MP , George Hammond Whalley .. Liberal. Liberal Party ( UK ). George Hammond Whalley. George Hammond Whalley
not_related.