CREATE TABLE table_47922 ("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 vacancy of team fc bayern munich, which had a date of appointment on 27 April 2009?
SELECT "Date of vacancy" FROM table_47922 WHERE "Team" = 'fc bayern munich' AND "Date of appointment" = '27 april 2009'
SELECT "Date of vacancy" FROM "table_47922" WHERE "Date of appointment" = '27 april 2009' AND "Team" = 'fc bayern munich'