user: Question: Tell me the average units sold for Square Enix
Columns: ['Place', 'Title', 'Platform', 'Publisher', 'Units sold']
Types: ['real', 'text', 'text', 'text', 'real']
Sample row: [1.0, 'Monster Hunter Portable 2nd G', 'PSP', 'Capcom', 2452111.0]
SQL:

assistant: SELECT AVG("Units sold") FROM "Table" WHERE "Publisher" = 'Square Enix';