CREATE TABLE table_41021 ("City of license" CLOB, "Identifier" CLOB, "Frequency" CLOB, "Power" CLOB, "Class" CLOB, "RECNet" CLOB)

Which class has a frequency of 91.9 fm?
SELECT "Class" FROM table_41021 WHERE "Frequency" = '91.9 fm'
SELECT "Class" FROM "table_41021" WHERE "Frequency" = '91.9 fm'