user: Question: Who were the opposing team when playing in the Portugal venue?
Columns: ['Date', 'Venue', 'Opponents', 'Score', 'Comp']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['2004-02-13', 'Birkerød', 'FC København', '1-4', 'Friendly']
SQL:

assistant: SELECT "Opponents" FROM "Table" WHERE "Venue" = 'Portugal';