What is <union of> of <galaxy group or cluster> ?
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What is the union for the galaxy group or cluster?
SELECT DISTINCT ?c WHERE { resource:galaxy_group_or_cluster property:union_of ?c }
select distinct ?answer where { ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q17512228> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P2737> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?answer. }
select distinct ?answer where { wd:Q17512228 wdt:P2737 ?answer}
list values as qualifiers