Question: To which airport which also serves the AER Lingus airline does Airtran Airways fly?
Answer(s):
answer: Logan International Airport

SPARQL query:
PREFIX ns: <http://rdf.freebase.com/ns/>
SELECT DISTINCT ?x
WHERE {
FILTER (?x != ns:m.01vk4t)
FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
ns:m.01vk4t ns:aviation.airline.airports_served ?y .
?y ns:aviation.airline_airport_presence.airport ?x .
?x ns:aviation.airport.airlines ?c .
?c ns:aviation.airline_airport_presence.airline ns:m.011kct . 
}