Question: What are the bordering countries to the wine regions that produce Retsina wine?
Answer(s):
answer: Bulgaria
answer: Turkey
answer: Republic of Macedonia
answer: Albania

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:wine.wine_region.wine_styles ns:m.01jg9j . 
?c ns:location.location.adjoin_s ?y .
?y ns:location.adjoining_relationship.adjoins ?x .
?x ns:common.topic.notable_types ns:m.01mp .
}