Question: What exhibition venue in Venice that was opened on 2008-06-28?
Answer(s):
answer: Palazzo Venier dei Leoni

SPARQL query:
PREFIX ns: <http://rdf.freebase.com/ns/>
SELECT DISTINCT ?x
WHERE {
FILTER (?x != ns:m.07_pf)
FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
ns:m.07_pf ns:travel.travel_destination.tourist_attractions ?x .
?x ns:exhibitions.exhibition_venue.exhibitions_at_this_venue ?c .
?c ns:exhibitions.exhibition_run.opened_on "2008-06-28"^^xsd:dateTime . 
}