Question: Where was the Palace of Knossos located, where the currency used in the country is the Euro?
Answer(s):
answer: Greece

SPARQL query:
PREFIX ns: <http://rdf.freebase.com/ns/>
SELECT DISTINCT ?x
WHERE {
FILTER (?x != ns:m.0ksnn)
FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
ns:m.0ksnn ns:location.location.containedby ?x .
?x ns:location.country.currency_used ns:m.02l6h . 
}