Question: What North African country had CO2 emissions per capita once of 1960 metric ton?
Answer(s):
answer: Sudan
answer: Sudan

SPARQL query:
PREFIX ns: <http://rdf.freebase.com/ns/>
SELECT DISTINCT ?x
WHERE {
FILTER (?x != ns:m.05g2v)
FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
ns:m.05g2v 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 "1960"^^xsd:dateTime . 
}