CREATE TABLE table_21274 ("Team" TEXT, "Outgoing manager" TEXT, "Manner of departure" TEXT, "Date of vacancy" TEXT, "Replaced by" TEXT, "Date of appointment" TEXT)

What was the date of appointment when J rgen Kohler was the outgoing manager?
SELECT "Date of appointment" FROM table_21274 WHERE "Outgoing manager" = 'Jürgen Kohler'
SELECT "Date of appointment" FROM "table_21274" WHERE "Outgoing manager" = 'Jürgen Kohler'