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

<https://lod.nal.usda.gov/naltv#marc001> rdfs:label "Field 001 in MARC Authority Format"@en .
<https://lod.nal.usda.gov/nalt>
  a skos:ConceptScheme ;
  rdfs:label "NALT Full"@en .

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

nalt:12311
  a skos:Concept, <https://lod.nal.usda.gov/naltv#Chemical> ;
  dc:created "2006-01-19"^^xsd:date ;
  dc:modified "2019-07-22"^^xsd:date ;
  skos:altLabel "PAHs (polycyclic aromatic hydrocarbons)"@en, "PAH (polycyclic aromatic hydrocarbons)"@en ;
  skos:broader nalt:12301, nalt:46298 ;
  skos:exactMatch <http://id.agrisemantics.org/gacs/C5928>, agrovoc:c_331394 ;
  skos:inScheme <https://lod.nal.usda.gov/nalt>, <https://lod.nal.usda.gov/nalt-core> ;
  skos:narrower nalt:287404, nalt:215494, nalt:59097, nalt:332458, nalt:257569, nalt:314109, nalt:209258, nalt:135573, nalt:34454, nalt:13552, nalt:12310 ;
  skos:prefLabel "polycyclic aromatic hydrocarbons"@en, "hidrocarburos aromáticos policíclicos"@es ;
  ns0:marc001 "29530" .

nalt:287404
  a ns0:Chemical, skos:Concept ;
  skos:broader nalt:12311 ;
  skos:prefLabel "fluorenos"@es, "fluorenes"@en .

nalt:215494
  a ns0:Chemical, skos:Concept ;
  skos:broader nalt:12311 ;
  skos:prefLabel "antracenos"@es, "anthracenes"@en .

nalt:59097
  a ns0:Chemical, skos:Concept ;
  skos:broader nalt:12311 ;
  skos:prefLabel "pyrene (hydrocarbon)"@en, "pireno (hidrocarburo)"@es .

nalt:332458
  a ns0:Chemical, skos:Concept ;
  skos:broader nalt:12311 ;
  skos:prefLabel "helicenes"@en, "helicenos"@es .

nalt:257569
  a ns0:Chemical, skos:Concept ;
  skos:broader nalt:12311 ;
  skos:prefLabel "indenes"@en, "indenos"@es .

nalt:12310
  a ns0:Chemical, skos:Concept ;
  skos:broader nalt:12311 ;
  skos:prefLabel "fenantreno"@es, "phenanthrenes"@en .

nalt:13552
  a ns0:Chemical, skos:Concept ;
  skos:broader nalt:12311 ;
  skos:prefLabel "naftalenos"@es, "naphthalenes"@en .

nalt:34454
  a ns0:Chemical, skos:Concept ;
  skos:broader nalt:12311 ;
  skos:prefLabel "naphthacenes"@en, "naftacenos"@es .

nalt:135573
  a ns0:Chemical, skos:Concept ;
  skos:broader nalt:12311 ;
  skos:prefLabel "difacinona"@es, "diphacinone"@en .

nalt:46298
  a ns0:Chemical, skos:Concept ;
  skos:narrower nalt:12311 ;
  skos:prefLabel "hidrocarburos policíclicos"@es, "polycyclic hydrocarbons"@en .

nalt:12301
  a ns0:Chemical, skos:Concept ;
  skos:narrower nalt:12311 ;
  skos:prefLabel "hidrocarburos aromáticos"@es, "aromatic hydrocarbons"@en .

nalt:209258
  a ns0:Chemical, skos:Concept ;
  skos:broader nalt:12311 ;
  skos:prefLabel "azaspirácido"@es, "azaspiracid"@en .

nalt:314109
  a ns0:Chemical, skos:Concept ;
  skos:broader nalt:12311 ;
  skos:prefLabel "asphaltenes"@en, "asfaltenos"@es .