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 5 | Dallas Cowboys | 13-3 | Washington Redskins | Robert F. Kennedy Memorial Stadium |
| November 12 | Los Angeles Raiders | 12-14 | San Diego Chargers | Jack Murphy Stadium |
| November 19 | New York Jets | 10-27 | Indianapolis Colts | Hoosier Dome |
| November 26 | Los Angeles Rams | 20-17 | New Orleans Saints | Louisiana Superdome |
| December 3 | Chicago Bears | 16-27 | Minnesota Vikings | Hubert H. Humphrey Metrodome |
| December 10 | New England Patriots | 10-31 | Miami Dolphins | Joe Robbie Stadium |
| December 17 | Los Angeles Raiders | 17-23 | Seattle Seahawks | Kingdome |
| December 23 | Cleveland Browns | 24-20 | Houston Oilers | Astrodome |
Question:
When were the Cleveland Browns the visiting team?
Answer:
December 23