How many {manifestation of} are to/by {UTF-8} ?
let you make me to know the manifestation of UTF-8?
How much manifestations are of UTF-8?
SELECT ( COUNT ( ?f ) AS ?p ) { ?f property:manifestation_of resource:UTF-8 }
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/P1557> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> http://wikidata.dbpedia.org/resource/Q193537 .
} 

SELECT (COUNT(?sub) AS ?value ) { ?sub wdt:P1557 wd:Q193537 }
4