Question: What time zone is Texas, the state that held the Houston mayoral election of 2009?
Answer(s):
answer: Central Time Zone

SPARQL query:
PREFIX ns: <http://rdf.freebase.com/ns/>
SELECT DISTINCT ?x
WHERE {
FILTER (?x != ?c)
FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
?c ns:government.political_district.elections ns:m.058f8jt . 
?c ns:location.location.time_zones ?x .
}