How many {director of photography} are for {Triumph of the Will} ?
How many directors of photography are there for Triumph of the Will?
SELECT (COUNT(?obj) AS ?value ) { wd:Q156497 wdt:P344 ?obj }
SELECT (COUNT(?obj) AS ?objs ) {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q156497> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P344> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?obj .
} 

What's the number of photography directors for Triumph of the Will?