user: Question: Who was the opponent in the Week 4 game?
Columns: ['Week', 'Date', 'Opponent', 'Score', 'Result', 'Attendance', 'Record']
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: [1.0, 'June 28', 'at Toronto Argonauts', '24–22', 'Win', '29,157', '1–0']
SQL:

assistant: SELECT "Opponent" FROM "Table" WHERE "Week" = 4.0;