What is the dma of branding is big oldies 107.3 with the station warv-fm?
CREATE TABLE "stations" (
  "dma" real,
  "market" text,
  "station" text,
  "frequency" text,
  "branding" text,
  "format" text
);
SELECT "dma" FROM "stations" WHERE "branding"='Big Oldies 107.3' AND "station"='WARV-FM';