How many {production designer} are for {The Wizard of Oz} ?
How many production designers are for the {The Wizard of Oz} ?
SELECT (COUNT(?obj) AS ?value ) { wd:Q193695 wdt:P2554 ?obj }
SELECT (COUNT(?obj) AS ?objs ) {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q193695> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P2554> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?obj .
} 

The Wizard of Ox has what number of production designers?