What is the {human} for {creator} of {Twitter}
Who is Twitter's creator?
Who is the person that created Twitter?
SELECT DISTINCT ?p WHERE { ?p rdf:type ontology:human . resource:Twitter property:creator ?p }
select distinct ?obj where { ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q918> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P170> . ?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:Q918 wdt:P170 ?obj . ?obj wdt:P31 wd:Q5 } 
Jack Dorsey