user: Question: How many incoming managers did Burnley have?
Columns: ['Team', 'Outgoing manager', 'Manner of departure', 'Date of vacancy', 'Position in table', 'Incoming manager', 'Date of appointment']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Crystal Palace', 'Paul Hart', 'Contract expired', '2 May 2010', 'Pre-season', 'George Burley', '17 June 2010']
SQL:

assistant: SELECT COUNT("Incoming manager") FROM "Table" WHERE "Team" = 'Burnley';