Table:
text: 1964 Green Bay Packers season
Schedule
Schedule
Week Date_ Opponent Result_ Venue Attendance
1 September 13, 1964 Chicago Bears W 23–12 City Stadium 42327
2 September 20, 1964 Baltimore Colts L 21–20 City Stadium 42327
3 September 28, 1964 at Detroit Lions W 14–10 Tiger Stadium 59203
4 October 4, 1964 Minnesota Vikings L 24–23 City Stadium 42327
5 October 11, 1964 San Francisco 49ers W 24–14 Milwaukee County Stadium 47380
6 October 18, 1964 at Baltimore Colts L 24–21 Memorial Stadium 60213
7 October 25, 1964 Los Angeles Rams L 27–17 Milwaukee County Stadium 47617
8 November 1, 1964 at Minnesota Vikings W 42–13 Metropolitan Stadium 44278

Question: What is the average attendance at a week 4 game for the 1964 Green Bay Packers?