What is the {sovereign state} for {head of state} of {Donald Trump}
What is the nation whose pioneer is Donald Trump ?
What is the country whose leader is Donald Trump ?
SELECT DISTINCT ?a WHERE { ?a rdf:type ontology:sovereign_state . ?a property:head_of_state resource:Donald_Trump }
select distinct ?subj where { ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> ?subj . ?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> <http://wikidata.dbpedia.org/resource/Q22686> . ?subj <http://www.wikidata.org/entity/P31> <http://wikidata.dbpedia.org/resource/Q3624078> } 
 select distinct ?sbj where { ?sbj wdt:P35 wd:Q22686 . ?sbj wdt:P31 wd:Q3624078 } 