With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: San Francisco was first colonized by Spanish colonists.
text_B: Tapachula International Airport , Aeropuerto Internacional de Tapachula , is an international airport located at Tapachula , Chiapas , Mexico , is Mexico 's southernmost airport .. airport. airport. Tapachula. Tapachula. Chiapas. Chiapas. Mexico. Mexico. It handles national and international air traffic for the city of Tapachula and the Port of Chiapas .. Tapachula. Tapachula. Chiapas. Chiapas. Port of Chiapas. Port of Chiapas. It is one of the fastest growing airports in the country  : in 2015 , it handled 265,670 passengers , and in 2016 , it handled 308,788 passengers .
not_related.