user: ### NOW ANSWER:
Question: What is the average week number for games that had 28,800 fans in attendance?
Columns: ['Week', 'Date', 'Opponent', 'Location', 'Final Score', 'Attendance', 'Record']
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: [1.0, 'June 27', '@ Blue Bombers', 'Canad Inns Stadium', 'W 23 – 16', '26,155', '1–0']
SQL:

assistant: SELECT AVG("Week") FROM "Table" WHERE "Attendance" = '28,800';