Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Game | Date | Opponent | Score | Location | Record |
| --- | --- | --- | --- | --- | --- |
| 15.0 | Sat. Dec. 1 | @ Cleveland Cavaliers | 110-104 | Richfield Coliseum | 14-1 |
| 16.0 | Sun. Dec. 2 | Cleveland Cavaliers | 122-99 | Boston Garden | 15-1 |
| 17.0 | Tue. Dec. 4 | @ Detroit Pistons | 99-104 | Pontiac Silverdome | 15-2 |
| 18.0 | Wed. Dec. 5 | Denver Nuggets | 123-107 | Boston Garden | 16-2 |
| 19.0 | Sat. Dec. 8 | @ New Jersey Nets | 107-98 | Brendan Byrne Arena | 17-2 |
| 20.0 | Sun. Dec. 9 | Atlanta Hawks | 128-127 | Boston Garden | 18-2 |
| 21.0 | Tue. Dec. 11 | New Jersey Nets | 130-121 | Hartford Civic Center | 19-2 |
| 22.0 | Wed. Dec. 12 | @ Philadelphia 76ers | 107-110 | The Spectrum | 19-3 |
| 23.0 | Fri. Dec. 14 | Utah Jazz | 117-106 | Boston Garden | 20-3 |
| 24.0 | Sat. Dec. 15 | @ Atlanta Hawks | 101-94 | The Omni | 21-3 |
| 25.0 | Tue. Dec. 18 | @ New York Knicks | 126-108 | Madison Square Garden | 22-3 |
| 26.0 | Wed. Dec. 19 | Milwaukee Bucks | 92-107 | Boston Garden | 22-4 |
| 27.0 | Fri. Dec. 21 | Indiana Pacers | 117-107 | Boston Garden | 23-4 |
| 28.0 | Sat. Dec. 22 | @ Chicago Bulls | 85-110 | Chicago Stadium | 23-5 |
| 29.0 | Wed. Dec. 26 | @ Phoenix Suns | 119-114 | Arizona Veterans Memorial Coliseum | 24-5 |
| 30.0 | Thu. Dec. 27 | @ Los Angeles Clippers | 118-103 | Los Angeles Memorial Sports Arena | 25-5 |
| 31.0 | Sat. Dec. 29 | @ San Antonio Spurs | 120-112 | HemisFair Arena | 26-5 |
| 32.0 | Sun. Dec. 30 | @ Milwaukee Bucks | 98-114 | The MECCA | 26-6 |
Question:
What date did the Boston Celtics play at Richfield Coliseum?
Answer:
Sat. Dec. 1