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:
| Date | Visiting team | Final score | Host team | Stadium |
| --- | --- | --- | --- | --- |
| November 22 | Indianapolis Colts | 31–13 | Atlanta Falcons | Georgia Dome |
| November 29 | Green Bay Packers | 27–37 | Dallas Cowboys | Texas Stadium |
| December 6 | Chicago Bears | 16–24 | Washington Redskins | FedEx Field |
| December 13 | Denver Broncos | 13–31 | Houston Texans | Reliant Stadium |
| December 15 | Cincinnati Bengals | 13–20 | San Francisco 49ers | Monster Park |
| December 20 | Pittsburgh Steelers | 41–24 | St. Louis Rams | Edward Jones Dome |
| December 22 | Dallas Cowboys | 20–13 | Carolina Panthers | Bank of America Stadium |
| December 29 | New England Patriots | 38–35 ( details ) | New York Giants | Giants Stadium |
Question:
Who is the Visiting team on december 20?
Answer:
Pittsburgh Steelers