user: Question: What was the location for when the opponent was @ Roughriders?
Columns: ['Week', 'Date', 'Opponent', 'Location', 'Final Score', 'Attendance', 'Record']
Types: ['real', 'text', 'text', 'text', 'text', 'real', 'text']
Sample row: [1.0, 'July 4', 'Alouettes', 'SkyDome', 'L 27 – 3', 14065.0, '0–1–0–0']
SQL:

assistant: SELECT "Location" FROM "Table" WHERE "Opponent" = '@ Roughriders';