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

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'