What is the {natural satellite} for {child astronomical body} of {Pluto}
Pluto has how numerous common satellites?
Pluto has how many natural satellites?
SELECT DISTINCT ?z WHERE { resource:Pluto property:child_astronomical_body ?z . ?z rdf:type ontology:natural_satellite }
select distinct ?obj where { ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q339> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P398> . ?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/Q2537> } 
 select distinct ?obj where { wd:Q339 wdt:P398 ?obj . ?obj wdt:P31 wd:Q2537 } 
Nix Hydra Kerberos Styx Charon