What is <MathWorld identifier> of <magic square> ?
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Which is the MathWorld identifier for magic square?
SELECT DISTINCT ?i WHERE { resource:magic_square property:MathWorld_identifier ?i }
select distinct ?answer where { ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q192089> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P2812> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?answer. }
select distinct ?answer where { wd:Q192089 wdt:P2812 ?answer}