CREATE TABLE table_69481 ("Call sign" TEXT, "Frequency MHz" FLOAT, "City of license" TEXT, "ERP W" FLOAT, "Class" TEXT, "FCC info" TEXT)

Which class's call sign is wokg?
SELECT "Class" FROM table_69481 WHERE "Call sign" = 'wokg'
SELECT "Class" FROM "table_69481" WHERE "Call sign" = 'wokg'