user: Question: What is the transfer fee of Assoumani, who has a Summer transfer window?
Columns: ['Name', 'Country', 'Type', 'Moving from', 'Transfer window', 'Ends', 'Transfer fee', 'Source']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Robinson', 'ENG', 'Free Agent', 'Swansea City', 'Summer', '2011', 'Free', 'Leeds United Yorkshire Evening Post']
SQL:

assistant: SELECT "Transfer fee" FROM "Table" WHERE "Transfer window" = 'Summer' AND "Name" = 'Assoumani';