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:
| Year | Award | Category | Film or series | Result |
| --- | --- | --- | --- | --- |
| 1998.0 | Gotham Awards | Best Actress | Slam | Won |
| 1998.0 | Sundance Film Festival | Grand Jury Prize | Slam | Won |
| 1998.0 | Independent Spirit Awards | Best Debut Performance | Slam | Nominated |
| 2005.0 | Image Awards | Outstanding Supporting Actress in a Drama Series | The Wire | Nominated |
| 2008.0 | Asian Excellence Awards | Outstanding Television Actress | The Wire | Won |
| 2009.0 | Image Awards | Outstanding Supporting Actress in a Drama Series | The Wire | Nominated |
Question:
Which category won the Sundance Film Festival award in 1998?
Answer:
Grand Jury Prize