Question: Which homes of the 2012 NCAA basketball tournament were opened prior to June 1, 1992?
Answer(s):
answer: UD Arena
answer: Mercedes-Benz Superdome
answer: Greensboro Coliseum Complex
answer: The Pit

SPARQL query:
PREFIX ns: <http://rdf.freebase.com/ns/>
SELECT DISTINCT ?x
WHERE {
FILTER (?x != ns:m.080nmfs)
FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
ns:m.080nmfs ns:time.event.locations ?x .
?x ns:architecture.structure.opened ?num .
FILTER (?num < "1992-06-01"^^xsd:dateTime) . 
}