Question: What's the official language of the location, that has a governmental office holder called. Wu Xiaoling?
Answer(s):
answer: Standard Chinese

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_holder ns:m.04g702_ . 
?c ns:location.country.official_language ?x .
}