CREATE TABLE table_name_54 (date_of_replacement VARCHAR, reason_of_departure VARCHAR, team VARCHAR)

On what date did the manager for PSIS Semarang take over for the manager that was sacked?
SELECT date_of_replacement FROM table_name_54 WHERE reason_of_departure = "sacked" AND team = "psis semarang"
SELECT "date_of_replacement" FROM "table_name_54" WHERE "psis semarang" = "team" AND "reason_of_departure" = "sacked"