Question: What time zone is the hub of the British European Airways airline?
Answer(s):
answer: Greenwich Mean 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:aviation.airport.airlines ?k .
?k ns:aviation.airline_airport_presence.airline ns:m.01wyl2 . 
?c ns:location.location.time_zones ?x .
}