How many {writing system} are to/by {hiragana} ?
For Hiragana, how many writing systems are there?
How many writing systems are by hiragana?
SELECT ( COUNT ( ?i ) AS ?o ) { ?i property:writing_system resource:hiragana }
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/P282> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> http://wikidata.dbpedia.org/resource/Q48332 .
} 

SELECT (COUNT(?sub) AS ?value ) { ?sub wdt:P282 wd:Q48332 }
252