What is the {language regulator} for {studies} of {Russian}
What authority regulates the Russian language?
 select distinct ?sbj where { ?sbj wdt:P2578 wd:Q7737 . ?sbj wdt:P31 wd:Q2093358 } 
select distinct ?subj where { ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> ?subj . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P2578> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q7737> . ?subj <http://www.wikidata.org/entity/P31> <http://wikidata.dbpedia.org/resource/Q2093358> } 
What expert controls the Russian language?