what is the {frequency} for {Balearic Islands} has {mains voltage} as {220.0} ?
Is the mains voltage frequency in the Balearic Islands 220.0?
SELECT ?value WHERE { wd:Q5765 p:P2884 ?s . ?s ps:P2884 ?x filter(contains(?x,'220.0')) . ?s pq:P2144 ?value}
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q5765> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P2884> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <220.0> .
?statement <http://www.wikidata.org/entity/P2144> ?value. 
} 

What is the main voltage frequency in Baleric island?