What kind of Replaced has a Manner of departure of end of contract on dec. 16, 2008?
CREATE TABLE "managerial_changes" (
  "team" text,
  "outgoing_manager" text,
  "manner_of_departure" text,
  "date_of_vacancy" text,
  "replaced_by" text,
  "date_of_appointment" text,
  "position_in_table" text
);
SELECT "replaced_by" FROM "managerial_changes" WHERE "manner_of_departure"='end of contract' AND "date_of_appointment"='dec. 16, 2008';