Question: What Nordic country had CO2 emissions capita once of 2010 metric ton?
Answer(s):
answer: Finland
answer: Faroe Islands
answer: Greenland
answer: Iceland
answer: Norway
answer: Sweden
answer: Denmark

SPARQL query:
PREFIX ns: <http://rdf.freebase.com/ns/>
SELECT DISTINCT ?x
WHERE {
FILTER (?x != ns:m.0140mf)
FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
ns:m.0140mf ns:location.location.contains ?x .
?x ns:common.topic.notable_types ns:m.01mp .
?x ns:location.statistical_region.co2_emissions_per_capita ?c .
?c ns:measurement_unit.dated_metric_ton.date "2010"^^xsd:dateTime . 
}