Question: Name the three official languages of Belgium, and also the language used in the fictional universe Boowa & Kwala.?
Answer(s):
answer: French

SPARQL query:
PREFIX ns: <http://rdf.freebase.com/ns/>
SELECT DISTINCT ?x
WHERE {
FILTER (?x != ns:m.0154j)
FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
ns:m.0154j ns:location.country.official_language ?x .
?x ns:fictional_universe.fictional_language.found_in_fictional_universe ns:m.0crsqqq . 
}