what is the power when the city of license is belleville?
CREATE TABLE "s_rebroadcaster_of_cjbc" (
  "city_of_license" text,
  "identifier" text,
  "frequency" text,
  "power" text,
  "class" text,
  "rec_net" text
);
SELECT "power" FROM "s_rebroadcaster_of_cjbc" WHERE "city_of_license"='belleville';