How many {costume designer} are for {Mary Poppins} ?
Mary Poppins had what number of costume designers?
How many costume designers did Mary Poppins have?
SELECT ( COUNT ( ?r ) AS ?x ) { resource:Mary_Poppins property:costume_designer ?r }
SELECT (COUNT(?obj) AS ?objs ) {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q209170> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P2515> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?obj .
} 

SELECT (COUNT(?obj) AS ?value ) { wd:Q209170 wdt:P2515 ?obj }
4