user: Question: What is the Attendance with a Week that is 18?
Columns: ['Week', 'Date', 'Opponent', 'Game Site', 'Final Score', 'Record', 'Attendance']
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: [1.0, 'September 5, 1993', 'New England Patriots', 'Rich Stadium', 'W 38–14', '1–0', '79,751']
SQL:

assistant: SELECT "Attendance" FROM "Table" WHERE "Week" = 18.0;