CREATE TABLE table_47919 ("Team" TEXT, "Outgoing manager" TEXT, "Manner of departure" TEXT, "Date of vacancy" TEXT, "Replaced by" TEXT, "Date of appointment" TEXT, "Position in table" TEXT)

What is the date of appointment of the manager who was replaced by markus babbel?
SELECT "Date of appointment" FROM table_47919 WHERE "Replaced by" = 'markus babbel'
SELECT "Date of appointment" FROM "table_47919" WHERE "Replaced by" = 'markus babbel'