Question: What political system is used by the government in both North Korea and Vietnam?
Answer(s):
answer: Socialist state
answer: Single-party state

SPARQL query:
PREFIX ns: <http://rdf.freebase.com/ns/>
SELECT DISTINCT ?x
WHERE {
FILTER (?x != ns:m.05b7q)
FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
ns:m.05b7q ns:location.country.form_of_government ?x .
?x ns:government.form_of_government.countries ns:m.01crd5 . 
}