Question: What airlines flies into the Ontario International Airport and was founded before 1988?
Answer(s):
answer: Great Lakes Airlines
answer: Ameriflight

SPARQL query:
PREFIX ns: <http://rdf.freebase.com/ns/>
SELECT DISTINCT ?x
WHERE {
FILTER (?x != ns:m.01l4_l)
FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
ns:m.01l4_l ns:aviation.airport.hub_for ?x .
?x ns:organization.organization.date_founded ?num .
FILTER (?num < "1988"^^xsd:dateTime) . 
}