user: Question: Which opponent is Friendly and played on 15-08-2012?
Columns: ['Date', 'Venue', 'Opponent', 'Result', 'Competition']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['10-05-2012', 'Milano Arena , Kumanovo', 'Macedonia', '0-1', 'Euro U21 Qualifier']
SQL:

assistant: SELECT "Opponent" FROM "Table" WHERE "Competition" = 'Friendly' AND "Date" = '15-08-2012';