How many {editor} are for {Vogue} ?
How many individuals act as editors for the magazine Vogue?
How many editors are there for Vogue magazine?
SELECT ( COUNT ( ?r ) AS ?g ) { resource:British_Vogue property:editor ?r }
SELECT (COUNT(?obj) AS ?objs ) {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q6351976> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P98> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?obj .
} 

SELECT (COUNT(?obj) AS ?value ) { wd:Q6351976 wdt:P98 ?obj }
10