What is {platforms} of {Half-Life}, that has {foundation date} is {1991-9-17} ?
What are the Half - Life platforms set in the 1991.9 - 17 foundation date?
What are the platforms in Half-Life that are set in the foundation date of 1991-9-17?
SELECT ?d WHERE { resource:Half-Life property:platform ?d . FILTER ( CONTAINS ( YEAR ( ?p ) , '1991' ) ) . ?d property:inception ?p }
SELECT ?answer WHERE { ?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q752241> . ?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P400>. ?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?answer . ?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> ?answer. ?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P571> . ?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <1991-9-17> . }
SELECT ?answer WHERE { wd:Q752241 wdt:P400 ?answer . ?answer wdt:P571 ?x FILTER(contains(YEAR(?x),'1991'))}
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