Question: What amusement park that opened in May 31, 1952 is there to go in Amsterdam?
Answer(s):
answer: Efteling

SPARQL query:
PREFIX ns: <http://rdf.freebase.com/ns/>
SELECT DISTINCT ?x
WHERE {
FILTER (?x != ns:m.0k3p)
FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
ns:m.0k3p ns:travel.travel_destination.tourist_attractions ?x .
?x ns:amusement_parks.park.opened "1952-05-31"^^xsd:dateTime . 
}