How many {writing system} are to/by {runes} ?
How many writing systems are in runes?
SELECT (COUNT(?sub) AS ?value ) { ?sub wdt:P282 wd:Q82996 }
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/Q82996 .
} 

Which is the number of writing systems that are in runes?