Question: Which country uses English as its native language and has an Acting Prime Minister?
Answer(s):
answer: New Zealand

SPARQL query:
PREFIX ns: <http://rdf.freebase.com/ns/>
SELECT DISTINCT ?x
WHERE {
FILTER (?x != ns:m.02h40lc)
FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
ns:m.02h40lc ns:language.human_language.main_country ?x .
?x ns:government.governmental_jurisdiction.governing_officials ?c .
?c ns:government.government_position_held.basic_title ns:m.04043ys . 
}