CREATE TABLE table_53999 ("Frequency" CLOB, "Call sign" CLOB, "Name" CLOB, "Format" CLOB, "Owner" CLOB)

What is the frequency of KFNW?
SELECT "Frequency" FROM table_53999 WHERE "Call sign" = 'kfnw'
SELECT "Frequency" FROM "table_53999" WHERE "Call sign" = 'kfnw'