What is the {human} for {head of state} of {Austrian Empire}
Who is the Austrian Empire's Head of State?
Who is the Head of State  of the Austrian Empire?
SELECT DISTINCT ?y WHERE { ?y rdf:type ontology:human . resource:Austrian_Empire property:head_of_state ?y }
select distinct ?obj where { ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q131964> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P35> . ?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:Q131964 wdt:P35 ?obj . ?obj wdt:P31 wd:Q5 } 
Francis II, Holy Roman Emperor