How many {language used} are for {Australia} ?
How many Australian languages are there?
How many languages are used in Australia?
SELECT ( COUNT ( ?x ) AS ?a ) { resource:Australia property:language_used ?x }
SELECT (COUNT(?obj) AS ?objs ) {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q408> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P2936> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?obj .
} 

SELECT (COUNT(?obj) AS ?value ) { wd:Q408 wdt:P2936 ?obj }
411