How many {narrator} are to/by {Tom Kenny} ?
Tom Kenny narrates how many items?
How many items are narrated by Tom Kenny?
SELECT ( COUNT ( ?w ) AS ?p ) { ?w property:narrator resource:Tom_Kenny }
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/P2438> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> http://wikidata.dbpedia.org/resource/Q299282 .
} 

SELECT (COUNT(?sub) AS ?value ) { ?sub wdt:P2438 wd:Q299282 }
6