CREATE TABLE table_203_749 (id NUMBER, "call sign" CLOB, "frequency" CLOB, "city of license" CLOB, "licensee" CLOB, "format" CLOB)

what call sign is listed directly before kbmk ?
SELECT "call sign" FROM table_203_749 WHERE id = (SELECT id FROM table_203_749 WHERE "call sign" = 'kbmk') - 1
SELECT "call sign" FROM "table_203_749" WHERE "id" = (SELECT "id" FROM "table_203_749" WHERE "call sign" = 'kbmk') - 1