Question: What is the postal mail code for the city in South Korea that hosted the 1988 Summer Olumpics?
Answer(s):
answer: 139-799

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:olympics.olympic_host_city.olympics_hosted ns:m.0l6mp . 
?c ns:location.citytown.postal_codes ?x .
}