Table:
text: 1960 San Francisco 49ers season
Schedule
Schedule
Week Date_ Opponent Result_ Attendance
11 December 4, 1960 at Los Angeles Rams W 23-7 77254
12 December 10, 1960 Green Bay Packers L 13-0 53612
13 December 18, 1960 Baltimore Colts W 34-10 57269

Question: What is the week number on December 18, 1960 from the 1960 San Francisco 49ers season?