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mads.xsd"><authority><topic authority="http://AATesaurus.cultura.gencat.cat/aat/getty_es">periodos coreanos</topic></authority><related type="narrower"><topic>Tres reinados</topic></related><related type="narrower"><topic>Reinado Silla unificado</topic></related><related type="narrower"><topic>Yi</topic></related><related type="narrower"><topic>Chosen</topic></related><related type="narrower"><topic>Koryo</topic></related><related type="broader"><topic>Coreano</topic></related></mads>