Question: In which country is Sarajevo located and has Serbian as an official language?
Answer(s):
answer: Bosnia and Herzegovina

SPARQL query:
PREFIX ns: <http://rdf.freebase.com/ns/>
SELECT DISTINCT ?x
WHERE {
FILTER (?x != ns:m.06n8j)
FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
ns:m.06n8j ns:location.location.containedby ?x .
?x ns:location.country.official_language ns:m.0k0sb . 
}