Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
Which category won the Sundance Film Festival award in 1998?

### Inputs:
table_name: table, columns: ['Year', 'Award', 'Category', 'Film or series', 'Result']

### Response:
SELECT Category FROM table WHERE Result = won AND Year = 1998 AND Award = sundance film festival