Who was the  incoming manager for the date of appointment of 15 january 2011?
CREATE TABLE "managerial_changes" (
  "team" text,
  "outgoing_manager" text,
  "manner_of_departure" text,
  "date_of_vacancy" text,
  "incoming_manager" text,
  "date_of_appointment" text
);
SELECT "incoming_manager" FROM "managerial_changes" WHERE "date_of_appointment"='15 January 2011';