Question: What places are in the Mountain time zone and was home ot the Navajo tribe?
Answer(s):
answer: Navajo Nation
answer: New Mexico
answer: Utah
answer: Arizona

SPARQL query:
PREFIX ns: <http://rdf.freebase.com/ns/>
SELECT DISTINCT ?x
WHERE {
FILTER (?x != ns:m.08k5jg)
FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
ns:m.08k5jg ns:people.ethnicity.geographic_distribution ?x .
?x ns:location.location.time_zones ns:m.02hczc . 
}