Table: hurling_manager_changes
Columns: team
outgoing_manager
manner_of_departure
date_of_vacancy
replaced_by
date_of_appointment
position

Question: Who is the outgoing manager when the date of vacancy is 13 october 2008?
SQL: SELECT "outgoing_manager" FROM hurling_manager_changes WHERE "date_of_vacancy" = '13 october 2008'