How many {country of citizenship} are to/by {Equatorial Guinea} ?
Which is the number of countries of citizenship that are by Equatorial Guinea?
How many countries of citizenship are by Equatorial Guinea?
SELECT ( COUNT ( ?i ) AS ?z ) { ?i property:country_of_citizenship resource:Equatorial_Guinea }
SELECT (COUNT(?sub) AS ?subs ) {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> ?sub .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P27> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> http://wikidata.dbpedia.org/resource/Q983 .
} 

SELECT (COUNT(?sub) AS ?value ) { ?sub wdt:P27 wd:Q983 }
276