With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Iceland has a diverse economy.
text_B: The Palacio de Lecumberri is a large building , formerly a prison , in the northeast of Mexico City , Mexico , which now houses the General National Archive -LRB- Archivo General de la Nacion -RRB- .. Mexico City. Mexico City. Mexico. Mexico. General National Archive. General National Archive ( Mexico ). Known in popular culture as The Black Palace of Lecumberri , it served as a penitentiary from 1900 to 1976 .. penitentiary. Prison. It was inaugurated by President Porfirio Diaz .. President. President of Mexico. Porfirio Diaz. Porfirio Diaz. The building was decommissioned as a prison in 1976 and turned over to the country 's National Archive in 1980 .. The National Archive is one of the oldest historical archives in the Americas .
not_related.