user: Question: What is the Transfer window with a status of Transfer from the country of WAL?
Columns: ['Name', 'Country', 'Status', 'Transfer window', 'Transfer fee']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Cox', 'ENG', 'Retired', 'Summer', 'Free']
SQL:

assistant: SELECT "Transfer window" FROM "Table" WHERE "Status" = 'Transfer' AND "Country" = 'WAL';