PREFIX geo:      <http://www.opengis.net/ont/geosparql#>
PREFIX gr:       <http://purl.org/goodrelations/v1#>
PREFIX rdfs:     <http://www.w3.org/2000/01/rdf-schema#>
PREFIX spacerel: <http://data.ordnancesurvey.co.uk/ontology/spatialrelations/>