@prefix historicbook: <http://data.odeuropa.eu/vocabulary/historic-book/> .
@prefix skos: <http://www.w3.org/2004/02/skos/core#> .
@prefix ns0: <http://dbpedia.org/property/> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .

historicbook:chemical
  skos:narrower historicbook:engines ;
  a skos:Concept ;
  skos:prefLabel "Chemical / Hydrocarbons"@en .

historicbook:industrial
  ns0:next historicbook:engines ;
  a skos:Concept ;
  skos:prefLabel "Industrial"@en .

historicbook:sweet
  ns0:prev historicbook:engines ;
  a skos:Concept ;
  skos:prefLabel "Sweet"@en .

historicbook:engines
  a skos:Concept ;
  skos:inScheme <http://data.odeuropa.eu/vocabulary/historic-book> ;
  skos:prefLabel "Engines"@en ;
  skos:broader historicbook:chemical ;
  ns0:next historicbook:sweet ;
  ns0:prev historicbook:industrial .

<http://data.odeuropa.eu/vocabulary/historic-book>
  a skos:ConceptScheme ;
  rdfs:label "Odour wheel of historic book"@en .