@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix owl: <http://www.w3.org/2002/07/owl#> .
@prefix nalt: <https://lod.nal.usda.gov/nalt/> .
@prefix skos: <http://www.w3.org/2004/02/skos/core#> .
@prefix dc: <http://purl.org/dc/terms/> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .
@prefix ns0: <https://lod.nal.usda.gov/naltv#> .

<https://lod.nal.usda.gov/naltv#Chemical>
  rdfs:label "Chemical"@en ;
  a owl:Class .

nalt:17688
  skos:prefLabel "petróleo"@es, "petroleum"@en ;
  a <https://lod.nal.usda.gov/naltv#Product>, skos:Concept ;
  skos:related nalt:314109 .

nalt:314109
  skos:prefLabel "asphaltenes"@en, "asfaltenos"@es ;
  dc:created "2018-02-23"^^xsd:date ;
  skos:related nalt:17688 ;
  skos:hiddenLabel "asphaltene"@en ;
  a <https://lod.nal.usda.gov/naltv#Chemical>, skos:Concept ;
  ns0:marc001 "85194" ;
  skos:inScheme <https://lod.nal.usda.gov/nalt> ;
  dc:modified "2018-11-14"^^xsd:date ;
  skos:broader nalt:12311 .

nalt:12311
  skos:prefLabel "hidrocarburos aromáticos policíclicos"@es, "polycyclic aromatic hydrocarbons"@en ;
  a ns0:Chemical, skos:Concept ;
  skos:narrower nalt:314109 .

<https://lod.nal.usda.gov/nalt>
  rdfs:label "NALT Full"@en ;
  a skos:ConceptScheme .