user: Question: Which Week has an Attendance of 63,447?
Columns: ['Week', 'Date', 'Opponent', 'Result', 'Channel', 'Stadium', 'Attendance']
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: [1.0, 'September 5, 2002', 'San Francisco 49ers', 'L 16–13', 'ESPN', 'Giants Stadium', '78,748']
SQL:

assistant: SELECT "Week" FROM "Table" WHERE "Attendance" = '63,447';