user: Question: When did they play against Wales?
Columns: ['Date', 'Venue', 'Opponent', 'Result', 'Competition']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['01/07/06', 'Nagai Stadium , Osaka', 'Japan', 'Win – 15–29', 'Pacific Nations Cup']
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "Opponent" = 'Wales';