Table: league_manager_changes
Columns: team
outgoing_manager
manner_of_departure
date_of_vacancy
replaced_by
date_of_appointment
position_in_table

Question: Name the replaced by for 8 july 2009
SQL: SELECT "replaced_by" FROM league_manager_changes WHERE "date_of_appointment" = '8 July 2009'

Question: Name the total number of replaced by for 13 june 2009
SQL: SELECT COUNT("replaced_by") FROM league_manager_changes WHERE "date_of_appointment" = '13 June 2009'

Question: Name the date of vacancy for manuel pellegrini
SQL: SELECT "date_of_vacancy" FROM league_manager_changes WHERE "outgoing_manager" = 'Manuel Pellegrini'