machine_question: what are the 7 countries that are part of central america and is the co2 emiisions per capita was once 2009 metric ton
question: Which of the seven Central American countries had co2 emissions per capita once of 2009 metric ton?
sparql: PREFIX ns: <http://rdf.freebase.com/ns/>
  SELECT DISTINCT ?x
  WHERE {
  FILTER (?x != ns:m.01tzh)
  FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
  ns:m.01tzh 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 "2009"^^xsd:dateTime . 
  }
webqsp_question: what are the 7 countries that are part of central america