CREATE TABLE table_name_79 (date_of_appointment VARCHAR, manner_of_departure VARCHAR, team VARCHAR)

What was the date of appointment for the manager of lecce when the previous manager's contract expired?
SELECT date_of_appointment FROM table_name_79 WHERE manner_of_departure = "contract expired" AND team = "lecce"
SELECT "date_of_appointment" FROM "table_name_79" WHERE "contract expired" = "manner_of_departure" AND "lecce" = "team"