Question: What location with an airport that serves Kleve (district) do Turkish people originate from?
Answer(s):
answer: Germany

SPARQL query:
PREFIX ns: <http://rdf.freebase.com/ns/>
SELECT DISTINCT ?x
WHERE {
FILTER (?x != ns:m.0hb7h_z)
FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
ns:m.0hb7h_z ns:people.ethnicity.geographic_distribution ?x .
?x ns:location.location.contains ?c .
?c ns:aviation.airport.serves ns:m.01b98m . 
}