PREFIX rdfs: PREFIX rdf: PREFIX dbo: PREFIX dct: DELETE { ?town dbo:populationMetro ?population . } INSERT { ?town dct:extent ?abstraction . ?abstraction rdf:value ?population ; rdfs:label ?abstractionLabel . } WHERE { ?town dbo:populationMetro ?population . OPTIONAL { ?town rdfs:label ?label . BIND(CONCAT("Metro population of ", STR(?label)) AS ?abstractionLabel) } BIND(IRI(CONCAT(STR(?town), "/abstraction/dbpedia-populationMetro2rdf-value")) AS ?abstraction) }