<http://reference.data.gov.uk/id/year/1991>	<http://www.w3.org/2006/time#inXSDgYear>	"1991" .
<http://reference.data.gov.uk/id/year/1991>	<http://www.w3.org/ns/prov#wasUsedBy>	<http://opendata.aragon.es/recurso/procedencia/3A29D6CA-8F84-E546-7656-46A920A41176> .
<http://reference.data.gov.uk/id/year/1991>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/2006/time#Instant> .