Table: league_manager_changes_9
Columns: team
outgoing_manager
date_outgoing
reason_of_departure
replaced_by
date_of_replacement

Question: Why did the manager who departed on August 1, 2008 leave?
SQL: SELECT "reason_of_departure" FROM league_manager_changes_9 WHERE "date_outgoing" = 'august 1, 2008'

Question: On what date did the manager for PSIS Semarang take over for the manager that was sacked?
SQL: SELECT "date_of_replacement" FROM league_manager_changes_9 WHERE "reason_of_departure" = 'sacked' AND "team" = 'psis semarang'

Question: Why did the manager who departed on August 1, 2008 leave?
SQL: SELECT "reason_of_departure" FROM league_manager_changes_9 WHERE "date_outgoing" = 'august 1, 2008'

Question: When did Peter Butler leave his team?
SQL: SELECT "date_outgoing" FROM league_manager_changes_9 WHERE "outgoing_manager" = 'peter butler'

Question: When did the manager take over for the manager that left on August 20, 2008?
SQL: SELECT "date_of_replacement" FROM league_manager_changes_9 WHERE "date_outgoing" = 'august 20, 2008'