user: Question: What was the source of an ENG transfer that paid a £1.5m transfer fee?
Columns: ['Name', 'Country', 'Status', 'Transfer window', 'Transfer fee', 'Source']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Kelly', 'IRE', 'Retired', 'Summer', 'n/a', 'Leeds United']
SQL:

assistant: SELECT "Source" FROM "Table" WHERE "Country" = 'ENG' AND "Transfer fee" = '£1.5m';