Question: In what structure that opened prior to 11 April 2000 was the 2012 World Series played?
Answer(s):
answer: AT&T Park

SPARQL query:
PREFIX ns: <http://rdf.freebase.com/ns/>
SELECT DISTINCT ?x
WHERE {
FILTER (?x != ns:m.0ds8qct)
FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
ns:m.0ds8qct ns:time.event.locations ?x .
?x ns:architecture.structure.opened ?num .
FILTER (?num < "2000-04-11"^^xsd:dateTime) . 
}