Question: Which popular attraction was established in San Diego in the year 1913?
Answer(s):
answer: Cabrillo National Monument

SPARQL query:
PREFIX ns: <http://rdf.freebase.com/ns/>
SELECT DISTINCT ?x
WHERE {
FILTER (?x != ns:m.071vr)
FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
ns:m.071vr ns:travel.travel_destination.tourist_attractions ?x .
?x ns:protected_sites.protected_site.date_established "1913-10-14"^^xsd:dateTime . 
}