How many {winner} are to/by {Ruth Prawer Jhabvala} ?
Among the winners, how many of them are Ruth Prawer Jhabvala?
How many of the winners are Ruth Prawer Jhabvala?
SELECT ( COUNT ( ?h ) AS ?k ) { ?h property:winner resource:Ruth_Prawer_Jhabvala }
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/P1346> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> http://wikidata.dbpedia.org/resource/Q235759 .
} 

SELECT (COUNT(?sub) AS ?value ) { ?sub wdt:P1346 wd:Q235759 }
4