user: Question: What was the manner of departure for Notts County with an incoming manager of Martin Allen
Columns: ['Team', 'Outgoing manager', 'Manner of departure', 'Date of vacancy', 'Incoming manager', 'Date of appointment', 'Position in table']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Milton Keynes Dons', 'Paul Ince', 'Resigned', '16 April 2010', 'Karl Robinson', '10 May 2010', 'Pre-season']
SQL:

assistant: SELECT "Manner of departure" FROM "Table" WHERE "Team" = 'Notts County' AND "Incoming manager" = 'Martin Allen';