Question: What languages are spoken in the country where the Prime Minister of Singapore is in office?
Answer(s):
answer: English Language
answer: Standard Chinese
answer: Tamil Language
answer: Malay Language

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:government.governmental_jurisdiction.governing_officials ?k .
?k ns:government.government_position_held.office_position_or_title ns:m.01z6_l . 
?c ns:location.country.official_language ?x .
}