<https://data.bnf.fr/date/1917-1921/> <http://www.w3.org/2000/01/rdf-schema#label> "1917-1921" .
<https://data.bnf.fr/date/1917-1921/> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/TR/owl-time/Interval> .
<https://data.bnf.fr/date/1917-1921/> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/TR/owl-time/Instant> .