About: http://dbpedia.org/resource/Category:1991

Property	Value
rdf:type	skos:Concept
rdfs:label	1991 software
skos:prefLabel	1991 software
is skos:subject of	dbpedia:WorldWideWeb dbpedia:Veritas_File_System dbpedia:Linux_kernel dbpedia:System_7 dbpedia:Pretty_Good_Privacy dbpedia:ViolaWWW

About: http://dbpedia.org/resource/Category:1991_software