What is the {human} for {employer} of {J. R. R. Tolkien}
Who is the employer of J.R.R. Tolkien?
Who employed J.R.R. Tolkien
SELECT DISTINCT ?a WHERE { ?a rdf:type ontology:human . ?a property:employer resource:J. R. R._Tolkien }
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/P108> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q892> . ?subj <http://www.wikidata.org/entity/P31> <http://wikidata.dbpedia.org/resource/Q5> } 
 select distinct ?sbj where { ?sbj wdt:P108 wd:Q892 . ?sbj wdt:P31 wd:Q5 } 
Robert Havard