Question: What is the currency of the country where they speak Czech Koruna?
Answer(s):
answer: Romani language
answer: Rusyn Language
answer: Bulgarian Language
answer: Czech Language
answer: Hungarian language
answer: Greek Language
answer: German Language
answer: Polish Language
answer: Russian Language
answer: Slovak Language
answer: Ukrainian Language
answer: Serbian language
answer: Croatian language

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:location.country.currency_used ns:m.04rpc3 . 
?c ns:location.country.languages_spoken ?x .
}