With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Tony Blair was elected after his predecessor's sudden death by heart attack.
text_B: Itambacuri is a Brazilian municipality located in the state of Minas Gerais .. Minas Gerais. Minas Gerais. municipality. Municipalities of Brazil. As of 2004 its population is estimated to be 23,424 .. Itambacuri contains its own airport , referred to as the ` Itambacuri airport ' .
not_related.