What is the {media player} for {operating system} of {MS-DOS}
What media player works on the MS-Dos working system?
What media player works on the MS-Dos operating system?
SELECT DISTINCT ?m WHERE { ?m property:operating_system resource:MS-DOS . ?m rdf:type ontology:media_player }
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/P306> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q47604> . ?subj <http://www.wikidata.org/entity/P31> <http://wikidata.dbpedia.org/resource/Q210337> } 
 select distinct ?sbj where { ?sbj wdt:P306 wd:Q47604 . ?sbj wdt:P31 wd:Q210337 } 
Winamp