machine_question: where are the timezones in the usa and locations near San Carlos Airport
question: In which USA timezone can the San Carlos Airport be found?
sparql: PREFIX ns: <http://rdf.freebase.com/ns/>
  SELECT DISTINCT ?x
  WHERE {
  FILTER (?x != ns:m.09c7w0)
  FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
  ns:m.09c7w0 ns:location.location.time_zones ?x .
  ?x ns:time.time_zone.locations_in_this_time_zone ?c .
  ?c ns:location.location.nearby_airports ns:m.01ngqj . 
  }
webqsp_question: where are the timezones in the usa