user: Question: On what Date was Wales the Opponent?
Columns: ['Date', 'City', 'Opponent', 'Results¹', 'Type of game']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['June 17', 'Zaragoza , Spain', 'Northern Ireland', '0:0', 'WC Round 1']
SQL:

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