Question: What amusement parks in Orlando, Florida opened prior to April 4, 1998?
Answer(s):
answer: Disney's Typhoon Lagoon
answer: SeaWorld Orlando
answer: Epcot
answer: Magic Kingdom
answer: Universal Studios Florida
answer: Wet 'n Wild Orlando
answer: Disney's Blizzard Beach
answer: Disney's River Country
answer: Universal Orlando
answer: Disney's Hollywood Studios

SPARQL query:
PREFIX ns: <http://rdf.freebase.com/ns/>
SELECT DISTINCT ?x
WHERE {
FILTER (?x != ns:m.0ply0)
FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
ns:m.0ply0 ns:travel.travel_destination.tourist_attractions ?x .
?x ns:amusement_parks.park.opened ?num .
FILTER (?num < "1998-04-22"^^xsd:dateTime) . 
}