When is the date of appointment when the position in table is 16?
CREATE TABLE "in_season" (
  "team" text,
  "outgoing_head_coach" text,
  "manner_of_departure" text,
  "date_of_vacancy" text,
  "position_in_table" real,
  "incoming_head_coach" text,
  "date_of_appointment" text
);
SELECT "date_of_appointment" FROM "in_season" WHERE "position_in_table"=16;