CREATE TABLE table_31963 ("Calls" CLOB, "Frequency" CLOB, "Branding" CLOB, "Format" CLOB, "Timeslot" CLOB, "Group owner" CLOB)

Tell me the timeslot of calls of wrko
SELECT "Timeslot" FROM table_31963 WHERE "Calls" = 'wrko'
SELECT "Timeslot" FROM "table_31963" WHERE "Calls" = 'wrko'