human
Return the geometry WKT for roads built after 2018.
gpt
```sparql
PREFIX :     <http://example.org/ontology#>
PREFIX geo:  <http://www.opengis.net/ont/geosparql#>
PREFIX rdf:  <http://www.w3.org/1999/02/22-rdf-syntax-ns#>

SELECT ?road ?wkt
WHERE {
  ?road rdf:type :Road ;
        :hasConstructionYear ?year ;
        :hasGeometry ?geom .
  ?geom geo:asWKT ?wkt .
  FILTER(?year > 2018)
}
```