CREATE TABLE table_22830 ("DMA" FLOAT, "Market" TEXT, "Station" TEXT, "Frequency" TEXT, "Branding" TEXT, "Format" TEXT)

What is the dma of branding is big oldies 107.3 with the station warv-fm?
SELECT "DMA" FROM table_22830 WHERE "Branding" = 'Big Oldies 107.3' AND "Station" = 'WARV-FM'
SELECT "DMA" FROM "table_22830" WHERE "Branding" = 'Big Oldies 107.3' AND "Station" = 'WARV-FM'