Question: In which state, for which the governmental jurisdiction location symbol was adapted after 1967, is Roswell/Area 51 located?
Answer(s):
answer: Nevada

SPARQL query:
PREFIX ns: <http://rdf.freebase.com/ns/>
SELECT DISTINCT ?x
WHERE {
FILTER (?x != ns:m.0yjq)
FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
ns:m.0yjq ns:location.location.containedby ?x .
?x ns:government.governmental_jurisdiction.official_symbols ?c .
?c ns:location.location_symbol_relationship.date_adopted ?num .
FILTER (?num > "1967"^^xsd:dateTime) . 
}