user: Question: Name the manner of departure for 1 December 2009
Columns: ['Team', 'Outgoing manager', 'Manner of departure', 'Date of vacancy', 'Replaced by', 'Date of appointment']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Inter Baku', 'Valentin Khodukin', 'Resigned', '10 June 2009', 'Kakhaber Tskhadadze', '10 June 2009']
SQL:

assistant: SELECT "Manner of departure" FROM "Table" WHERE "Date of vacancy" = '1 December 2009';