With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: John McCain campaigned in the 55th quadrennial presidential election.
text_B: Macrolobium is a legume genus in the subfamily Detarioideae .. Detarioideae. Detarioideae. legume. legume. genus. genus. subfamily. subfamily. It is a tropical genus with about 80 species .. genus. genus. Half occur in Brazil , where they are common in the floodplains of the Amazonian Basin .. Brazil. Brazil. Members of the genus are used as ornamentals and for their wood .. genus. genus
not_related.