@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#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix owl: <http://www.w3.org/2002/07/owl#> .
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .

nalt:62338
  skos:prefLabel "arena"@es, "sand"@en ;
  a <https://lod.nal.usda.gov/naltv#Topic>, skos:Concept ;
  skos:narrower nalt:105520 .

nalt:105520
  skos:definition nalt:105520_def ;
  skos:prefLabel "arenas de alquitrán"@es, "oil sands"@en ;
  skos:inScheme <https://lod.nal.usda.gov/nalt> ;
  skos:hiddenLabel "oil sand cake"@en, "oil-sands"@en, "oil-bearing sand"@en, "oil sand"@en, "oil-bearing sands"@en, "bituminous sand"@en ;
  skos:broader nalt:62338, nalt:55741 ;
  skos:altLabel "bituminous sands"@en ;
  a skos:Concept, <https://lod.nal.usda.gov/naltv#Topic> ;
  skos:exactMatch <http://id.loc.gov/authorities/subjects/sh85094351> ;
  dc:modified "2017-12-06"^^xsd:date ;
  dc:created "2007-11-05"^^xsd:date ;
  ns0:marc001 "53239" .

ns0:Topic
  rdfs:label "Topic"@en ;
  a owl:Class .

nalt:55741
  skos:prefLabel "pizarra de aceite"@es, "oil shale"@en ;
  a ns0:Topic, skos:Concept ;
  skos:narrower nalt:105520 .

nalt:105520_def
  rdf:value "Combinación de arcilla, arena, agua y bitumen (aceite negro, pesado y viscoso). Puede ser extraída y procesada para sacar el bitumen, que es rico en alquitrán, para luego refinarlo hasta convertirlo en aceite. El bitumen en su estado natural no puede ser bombeado desde el suelo, por lo que a menudo las arenas de alquitrán son extraídas mediante técnicas de minería a cielo abierto. El aceite se saca también por medio de calefacción subterránea, con un enriquecimiento adicional."@es, "Oil sands are a combination of clay, sand, water, and bitumen, a heavy black viscous oil. Oil sands can be mined and processed to extract the oil-rich bitumen, which is then refined into oil. The bitumen in oil sands cannot be pumped from the ground in its natural state; instead oil sand deposits are mined, usually using strip mining or open pit techniques, or the oil is extracted by underground heating with additional upgrading."@en ;
  dc:source "The United States Geological Survey, U.S. Department of the Interior" ;
  a ns0:Definition .

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