Question: Which structure opened on 04-18-1991 and is where the Chicago White Sox play their home games?
Answer(s):
answer: U.S. Cellular Field

SPARQL query:
PREFIX ns: <http://rdf.freebase.com/ns/>
SELECT DISTINCT ?x
WHERE {
FILTER (?x != ns:m.01slc)
FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
ns:m.01slc ns:sports.sports_team.arena_stadium ?x .
?x ns:architecture.structure.opened "1991-04-18"^^xsd:dateTime . 
}