What is listed for the RECNet that also has a Frequency of 91.1 FM?
CREATE TABLE "s_rebroadcaster_of_cbfx_fm" (
  "city_of_license" text,
  "identifier" text,
  "frequency" text,
  "power" text,
  "class" text,
  "rec_net" text
);
SELECT "rec_net" FROM "s_rebroadcaster_of_cbfx_fm" WHERE "frequency"='91.1 fm';