Table: manager_changes_2008_09
Columns: team
outgoing_manager
manner_of_departure
date_of_vacancy
replaced_by
date_of_appointment

Question: Who was the outgoing manager that was replaced by Thomas Von Heesen?
SQL: SELECT "outgoing_manager" FROM manager_changes_2008_09 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 manager_changes_2008_09 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 manager_changes_2008_09 WHERE "team" = 'aek' AND "replaced_by" = 'christos kassianos'