human
List all buildings that have no geometry but do have a construction year.
gpt
```sparql
PREFIX :      <http://example.org/ontology#>
PREFIX rdf:   <http://www.w3.org/1999/02/22-rdf-syntax-ns#>

SELECT ?building ?year
WHERE {
  ?building rdf:type :Building ;
            :hasConstructionYear ?year .
  FILTER NOT EXISTS {
    ?building :hasGeometry ?geom .
  }
}
```