How many {programming language} are to/by {Perl} ?
Perl makes what number of programming languages?
How many programming languages are made by Perl?
SELECT ( COUNT ( ?z ) AS ?c ) { ?z property:programming_language resource:Perl }
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/P277> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> http://wikidata.dbpedia.org/resource/Q42478 .
} 

SELECT (COUNT(?sub) AS ?value ) { ?sub wdt:P277 wd:Q42478 }
225