user: Question: On what date was Paulo Sousa appointed?
Columns: ['Name', 'Club', 'Date of departure', 'Replacement', 'Date of appointment']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Dean Glover', 'Port Vale', '2 May 2009', 'Micky Adams', '1 June 2009']
SQL:

assistant: SELECT "Date of appointment" FROM "Table" WHERE "Replacement" = 'Paulo Sousa';