What is <astronomical filter> of <Messier object> ?
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What is astronomical filter for Messier object?
SELECT DISTINCT ?x WHERE { resource:Messier_object property:astronomical_filter ?x }
select distinct ?answer where { ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q14530> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P1227> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?answer. }
select distinct ?answer where { wd:Q14530 wdt:P1227 ?answer}
visual perception