CREATE TABLE "managerial_changes" (
  "team" text,
  "outgoing_manager" text,
  "manner_of_departure" text,
  "date_of_vacancy" text,
  "replaced_by" text,
  "date_of_appointment" text
);

Question: Who was the outgoing manager that was replaced by Thomas Von Heesen?
SQL: SELECT "outgoing_manager" FROM "managerial_changes" WHERE "replaced_by"='thomas von heesen';

Question: What was the date of vacancy of svetozar šapurić who departed with mutual consent?
SQL: SELECT "date_of_vacancy" FROM "managerial_changes" WHERE "manner_of_departure"='mutual consent' AND "outgoing_manager"='svetozar šapurić';

Question: What was the date of appointment for Christos Kassianos who belonged to AEK?
SQL: SELECT "date_of_appointment" FROM "managerial_changes" WHERE "team"='aek' AND "replaced_by"='christos kassianos';