Table: iran_pro_league_managers
Columns: team
outgoing_manager
manner_of_departure
date_of_vacancy
replaced_by
date_of_appointment

Question: Who was the replacement manager for the vacancy of 12 Dec 2009?
SQL: SELECT "replaced_by" FROM iran_pro_league_managers WHERE "date_of_vacancy" = '12 Dec 2009'

Question: Who was the replacement manager for the vacancy of 12 Dec 2009?
SQL: SELECT "replaced_by" FROM iran_pro_league_managers WHERE "date_of_vacancy" = '12 Dec 2009'

Question: What team did Alireza mansourian leave?
SQL: SELECT "team" FROM iran_pro_league_managers WHERE "outgoing_manager" = 'Alireza Mansourian'

Question: Why did Majid bagherinia leave?
SQL: SELECT "manner_of_departure" FROM iran_pro_league_managers WHERE "outgoing_manager" = 'Majid Bagherinia'

Question: What team did a manager leave on 12 Dec 2009
SQL: SELECT "team" FROM iran_pro_league_managers WHERE "date_of_vacancy" = '12 Dec 2009'

Question: How many teams did Farhad Kazemi leave?
SQL: SELECT COUNT("team") FROM iran_pro_league_managers WHERE "outgoing_manager" = 'Farhad Kazemi'