Question: What money is used by the country that uses power plug type BS 546?
Answer(s):
answer: Afghan afghani

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:engineering.location_with_mains_power.mains_power_standards ?k .
?k ns:engineering.mains_power.compatible_plugs ns:m.08cmzb . 
?c ns:location.country.currency_used ?x .
}