With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Rio de Janeiro is not in Brazil.
text_B: Tecamac is a municipality in State of Mexico in Mexico .. State. States of Mexico. State of Mexico. State of Mexico. municipality. Municipalities of Mexico State. Mexico. Mexico. The municipality covers an area of 157.34 km ² .. municipality. Municipalities of Mexico State. The municipal seat lies in the town -LRB- locality -RRB- of Tecamac de Felipe Villanueva .. Its largest town , Ojo de Agua , with a population of 242,283 inhabitants , is the largest locality in Mexico that is not a municipal seat .. Mexico. Mexico. As of the 2010 census , the municipality had a total population of 364,579 inhabitants .. municipality. Municipalities of Mexico State
not_related.