How many {commissioned by} are to/by {Works Progress Administration} ?
The Works Progress Administration has how many people designated to work for it?
How many people are commissioned for {Works Progress Administration} ?
SELECT ( COUNT ( ?p ) AS ?r ) { ?p property:commissioned_by resource:Works_Progress_Administration }
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/P88> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> http://wikidata.dbpedia.org/resource/Q1200079 .
} 

SELECT (COUNT(?sub) AS ?value ) { ?sub wdt:P88 wd:Q1200079 }
7