Question: Which amusement park in Palm Springs opened in 1999?
Answer(s):
answer: Knott's Soak City

SPARQL query:
PREFIX ns: <http://rdf.freebase.com/ns/>
SELECT DISTINCT ?x
WHERE {
FILTER (?x != ns:m.0r3tq)
FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
ns:m.0r3tq ns:travel.travel_destination.tourist_attractions ?x .
?x ns:amusement_parks.park.opened "1999"^^xsd:dateTime . 
}