Table:
text: 1998 New England Patriots season
Schedule
Schedule
Week Date_ Opponent Result_ TV_Time
10 November 8, 1998 Atlanta Falcons L 41–10 FOX 1:00pm
11 November 15, 1998 at Buffalo Bills L 13–10 CBS 1:00pm
12 November 23, 1998 Miami Dolphins W 26–23 ABC 9:00pm
13 November 29, 1998 Buffalo Bills W 25–21 CBS 4:15pm
14 December 6, 1998 at Pittsburgh Steelers W 23–9 CBS 4:15pm
15 December 13, 1998 at St. Louis Rams L 32–18 CBS 1:00pm
16 December 20, 1998 San Francisco 49ers W 24–21 FOX 1:00pm
17 December 27, 1998 at New York Jets L 31–10 CBS 1:00pm

Question: Which opponent was playing for the New England Patriots' Schedule on December 20, 1998?