How many {molecular function} are to/by {DNA polymerase} ?
Which molecular functions are performed by polymerase in DNA?
How many molecular fuctions are done by DNA polymerase?
SELECT ( COUNT ( ?z ) AS ?r ) { ?z property:molecular_function resource:DNA_polymerase }
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/P680> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> http://wikidata.dbpedia.org/resource/Q206286 .
} 

SELECT (COUNT(?sub) AS ?value ) { ?sub wdt:P680 wd:Q206286 }
16