CREATE TABLE table_63899 ("Frequency" CLOB, "Call sign" CLOB, "Branding" CLOB, "Format" CLOB, "Owner" CLOB)

What's the call sign for Jack FM?
SELECT "Call sign" FROM table_63899 WHERE "Branding" = 'jack fm'
SELECT "Call sign" FROM "table_63899" WHERE "Branding" = 'jack fm'