CREATE TABLE table_name_41 (date_of_departure VARCHAR2, replaced_by VARCHAR2)

When was the departure date when a manager was replaced by Bojan Pra nikar?
SELECT date_of_departure FROM table_name_41 WHERE replaced_by = "bojan prašnikar"
SELECT "date_of_departure" FROM "table_name_41" WHERE "bojan prašnikar" = "replaced_by"