Question: Which UK countries have the English Language as an official language?
Answer(s):
answer: Northern Ireland
answer: Scotland
answer: Wales

SPARQL query:
PREFIX ns: <http://rdf.freebase.com/ns/>
SELECT DISTINCT ?x
WHERE {
FILTER (?x != ns:m.07ssc)
FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
ns:m.07ssc ns:base.aareas.schema.administrative_area.administrative_children ?x .
?x ns:base.aareas.schema.administrative_area.administrative_area_type ns:m.0hzjlmp .
?x ns:location.country.official_language ns:m.02h40lc . 
}