How many {language used} are to/by {Chinese} ?
How many languages are spoken by the Chinese?
SELECT (COUNT(?sub) AS ?value ) { ?sub wdt:P2936 wd:Q7850 }
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/P2936> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> http://wikidata.dbpedia.org/resource/Q7850 .
} 

The Chinese speak how many different dialects?