CREATE TABLE table_14921 ("Station" CLOB, "Frequency" FLOAT, "Network Affiliation" CLOB, "Format" CLOB, "City of License" CLOB, "Status" CLOB)

Which format has a Station of klok?
SELECT "Format" FROM table_14921 WHERE "Station" = 'klok'
SELECT "Format" FROM "table_14921" WHERE "Station" = 'klok'