What is <ATP player ID> of <Ken Rosewall> ?
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Which is the ATP player ID for Ken Rosewall?
SELECT DISTINCT ?p WHERE { resource:Ken_Rosewall property:ATP_player_ID ?p }
select distinct ?answer where { ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q312728> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P536> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?answer. }
select distinct ?answer where { wd:Q312728 wdt:P536 ?answer}