Question: Which structure opened on 1934-08-11 was where Al Capone was imprisoned?
Answer(s):
answer: Alcatraz Federal Penitentiary

SPARQL query:
PREFIX ns: <http://rdf.freebase.com/ns/>
SELECT DISTINCT ?x
WHERE {
FILTER (?x != ns:m.014gr)
FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
ns:m.014gr ns:base.prison.prisoner.imprisoned ?y .
?y ns:base.prison.imprisonment.prison ?x .
?x ns:architecture.structure.opened "1934-08-11"^^xsd:dateTime . 
}