human
List the building and address, limit 5.
gpt
```sparql
PREFIX :     <http://example.org/ontology#>
PREFIX rdf:  <http://www.w3.org/1999/02/22-rdf-syntax-ns#>

SELECT ?building ?addr
WHERE {
  ?building rdf:type :Building .
  OPTIONAL {
    ?building :hasAddress ?addr .
  }
}
LIMIT 5
```