Question: What currency is used in the country that contains the circulation area of  Social-Demokraten?
Answer(s):
answer: Swedish krona

SPARQL query:
PREFIX ns: <http://rdf.freebase.com/ns/>
SELECT DISTINCT ?x
WHERE {
FILTER (?x != ?c)
FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
?c ns:periodicals.newspaper_circulation_area.newspapers ns:m.0d2yqr . 
?c ns:location.country.currency_used ?x .
}