How many {sponsor} are to/by {United Nations Educational, Scientific and Cultural Organization} ?
What is the number of people sponsored by the UN?
How many people does the UN sponsor?
SELECT ( COUNT ( ?u ) AS ?l ) { ?u property:sponsor resource:UNESCO }
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/P859> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> http://wikidata.dbpedia.org/resource/Q7809 .
} 

SELECT (COUNT(?sub) AS ?value ) { ?sub wdt:P859 wd:Q7809 }
10