CREATE TABLE table_21553 ("Team" TEXT, "Outgoing manager" TEXT, "Manner of departure" TEXT, "Date of vacancy" TEXT, "Replaced by" TEXT, "Date of appointment" TEXT, "Position in table" TEXT)

Name the date of appointment for sacked and 14th position replaced by marco kostmann
SELECT "Date of appointment" FROM table_21553 WHERE "Manner of departure" = 'Sacked' AND "Position in table" = '14th' AND "Replaced by" = 'Marco Kostmann'
SELECT "Date of appointment" FROM "table_21553" WHERE "Manner of departure" = 'Sacked' AND "Position in table" = '14th' AND "Replaced by" = 'Marco Kostmann'