What is the {SI derived unit} for {measured by} of {frequency}
What is the SI unit for frequency?
What is the SI unit for frequency?
SELECT DISTINCT ?r WHERE { resource:frequency property:measurement_scale ?r . ?r rdf:type ontology:SI_derived_unit }
select distinct ?obj where { ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q11652> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P1880> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?obj . ?obj <http://www.wikidata.org/entity/P31> <http://wikidata.dbpedia.org/resource/Q208469> } 
 select distinct ?obj where { wd:Q11652 wdt:P1880 ?obj . ?obj wdt:P31 wd:Q208469 } 