user: Question: What week was the game played at Mile High Stadium?
Columns: ['Week', 'Date', 'Opponent', 'Result', 'Venue', 'Attendance', 'Record']
Types: ['real', 'text', 'text', 'text', 'text', 'real', 'text']
Sample row: [1.0, 'September 6, 1968', 'at San Diego Chargers', '29–13 L', 'San Diego Stadium', 33687.0, '0–1']
SQL:

assistant: SELECT "Week" FROM "Table" WHERE "Venue" = 'Mile High Stadium';