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:
| Week | Date | Opponent | Result | Score | Record |
| --- | --- | --- | --- | --- | --- |
| 1.0 | August 29, 1948 | Buffalo Bills | W | 35-14 | 1-0 |
| 2.0 | September 5, 1948 | Brooklyn Dodgers | W | 36-20 | 2-0 |
| 3.0 | September 12, 1948 | New York Yankees | W | 41-0 | 3-0 |
| 4.0 | September 19, 1948 | Los Angeles Dons | W | 36-14 | 4-0 |
| 5.0 | September 26, 1948 | at Buffalo Bills | W | 38-28 | 5-0 |
| 6.0 | October 1, 1948 | at Chicago Rockets | W | 31-14 | 6-0 |
| 7.0 | October 10, 1948 | at Baltimore Colts | W | 56-14 | 7-0 |
| 8.0 | October 17, 1948 | at New York Yankees | W | 21-7 | 8-0 |
| 9.0 | October 24, 1948 | Baltimore Colts | W | 21-10 | 9-0 |
| 10.0 | November 7, 1948 | Chicago Rockets | W | 44-21 | 10-0 |
| 11.0 | November 14, 1948 | at Cleveland Browns | L | 14-7 | 10-1 |
| 12.0 | November 21, 1948 | at Brooklyn Dodgers | W | 63-40 | 11-1 |
| 13.0 | November 28, 1948 | Cleveland Browns | L | 31-28 | 11-2 |
| 14.0 | December 5, 1948 | at Los Angeles Dons | W | 38-21 | 12-2 |
Question:
Who was the opponent in week 13?
Answer:
Cleveland Browns