How many {native language} are to/by {Polish} ?
What is the number of native Polish speakers?
How many people use Polish as their native language?
SELECT ( COUNT ( ?f ) AS ?b ) { ?f property:native_language resource:Polish }
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/P103> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> http://wikidata.dbpedia.org/resource/Q809 .
} 

SELECT (COUNT(?sub) AS ?value ) { ?sub wdt:P103 wd:Q809 }
4204