Question: Which site of the Battle of Vicksburg has o2 emissions of 0.618433561?
Answer(s):
answer: Warren County

SPARQL query:
PREFIX ns: <http://rdf.freebase.com/ns/>
SELECT DISTINCT ?x
WHERE {
FILTER (?x != ns:m.01hf7f)
FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
ns:m.01hf7f ns:time.event.locations ?x .
?x ns:location.statistical_region.co2_emissions_total ?c .
?c ns:location.co2_emission.emissions "0.618433561" . 
}