user: Question: How many were in attendance when the game was held in Arrowhead Stadium?
Columns: ['Week', 'Date', 'Opponent', 'Result', 'Game site', 'Record', 'Attendance']
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'real']
Sample row: [1.0, 'September 8', 'at Los Angeles Rams', 'L 16–20', 'Anaheim Stadium', '0–1', 52522.0]
SQL:

assistant: SELECT "Attendance" FROM "Table" WHERE "Game site" = 'Arrowhead Stadium';