How many {league} are to/by {Serie A} ?
How many leagues are in series A?
Series A has how many leagues?
SELECT ( COUNT ( ?e ) AS ?h ) { ?e property:league resource:Serie_A }
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/P118> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> http://wikidata.dbpedia.org/resource/Q15804 .
} 

SELECT (COUNT(?sub) AS ?value ) { ?sub wdt:P118 wd:Q15804 }
57