How many {dialect of} are to/by {Russian} ?
How many dialects are there in the Russian language?
SELECT (COUNT(?sub) AS ?value ) { ?sub wdt:P4913 wd:Q7737 }
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/P4913> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> http://wikidata.dbpedia.org/resource/Q7737 .
} 

Which is the number of dialects for the Russian language?