CREATE TABLE table_22415 ("Frequency" CLOB, "Call sign" CLOB, "Branding" CLOB, "Format" CLOB, "Owner" CLOB, "Language/Rebroadcast" CLOB)

When hot adult contemporary is the format what is the call sign?
SELECT "Call sign" FROM table_22415 WHERE "Format" = 'hot adult contemporary'
SELECT "Call sign" FROM "table_22415" WHERE "Format" = 'hot adult contemporary'