user: Question: What is the transfer fee for Helguera?
Columns: ['Nat.', 'Name', 'Moving from', 'Type', 'Transfer window', 'Ends', 'Transfer fee']
Types: ['text', 'text', 'text', 'text', 'text', 'real', 'text']
Sample row: ['ENG', 'McManaman', 'Liverpool', 'Transfer', 'Summer', 2003.0, 'Free']
SQL:

assistant: SELECT "Transfer fee" FROM "Table" WHERE "Name" = 'Helguera';