Question: What country is South America has the calling code of 500?
Answer(s):
answer: Falkland Islands

SPARQL query:
PREFIX ns: <http://rdf.freebase.com/ns/>
SELECT DISTINCT ?x
WHERE {
FILTER (?x != ns:m.06n3y)
FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
ns:m.06n3y ns:location.location.contains ?x .
?x ns:common.topic.notable_types ns:m.01mp .
?x ns:location.country.calling_code "500" . 
}