How many {applies to jurisdiction} are to/by {Mercosur} ?
Give me the number of Jurisdictions within Mercosur
How many jurisdictions are within Mercosur?
SELECT ( COUNT ( ?q ) AS ?x ) { ?q property:applies_to_jurisdiction resource:Mercosur }
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/P1001> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> http://wikidata.dbpedia.org/resource/Q4264 .
} 

SELECT (COUNT(?sub) AS ?value ) { ?sub wdt:P1001 wd:Q4264 }
13