What is the {TV production company} for {employer} of {Oprah Winfrey}
[]
Who is the TV production company that employs Oprah WInfrey?
SELECT DISTINCT ?f WHERE { ?f rdf:type ontology:television_production_company . resource:Oprah_Winfrey property:employer ?f }
select distinct ?obj where { ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q55800> . ?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> ?obj . ?obj <http://www.wikidata.org/entity/P31> <http://wikidata.dbpedia.org/resource/Q10689397> } 
 select distinct ?obj where { wd:Q55800 wdt:P108 ?obj . ?obj wdt:P31 wd:Q10689397 } 
Harpo Productions