user: Question: Which Transfer fee has a From club of Blackburn Rovers?
Columns: ['Date', 'Pos.', 'Player', 'From club', 'Transfer fee']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Sep. 2008', 'FW', 'Marcello Trotta', 'Napoli', '£750,000 [x]']
SQL:

assistant: SELECT "Transfer fee" FROM "Table" WHERE "From club" = 'Blackburn Rovers';