How many {characters} are to/by {Jacob} ?
Which is the number of characters by Jacob?
How many characters are by Jacob?
SELECT ( COUNT ( ?v ) AS ?l ) { ?v property:characters resource:Jacob }
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/P674> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> http://wikidata.dbpedia.org/resource/Q289957 .
} 

SELECT (COUNT(?sub) AS ?value ) { ?sub wdt:P674 wd:Q289957 }
8