What is the {human} for {structural engineer} of {Burj Khalifa}
Who is Burj Khalifa's structural engineer?
Who is the person that is the structural engineer of Burj Khalifa?
SELECT DISTINCT ?m WHERE { resource:Burj_Khalifa property:structural_engineer ?m . ?m rdf:type ontology:human }
select distinct ?obj where { ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q12495> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P631> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?obj . ?obj <http://www.wikidata.org/entity/P31> <http://wikidata.dbpedia.org/resource/Q5> } 
 select distinct ?obj where { wd:Q12495 wdt:P631 ?obj . ?obj wdt:P31 wd:Q5 } 
William F. Baker