@prefix dcterms: <http://purl.org/dc/terms/> .
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix schema: <http://schema.org/> .
@prefix skos: <http://www.w3.org/2004/02/skos/core#> .
@prefix vcard: <http://www.w3.org/2006/vcard/ns#> .
<http://example.com/contact_details/example.ttl>
  a vcard:Voice;
  rdfs:label "Phone number";
  rdf:value "+1-555-555-0199;ext=555";
  skos:note "Capitol Hill"@en;
  schema:validFrom "1970-01"^^dcterms:W3CDTF;
  schema:validUntil "1971-12-31"^^dcterms:W3CDTF .