user: Question: What's the category in 1998 with the role/episode of David Duchovny?
Columns: ['Year', 'Category', 'Recipients and nominees', 'Role/Episode', 'Result']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [1994.0, 'Best Series – Drama', 'Best Series – Drama', 'Best Series – Drama', 'Won']
SQL:

assistant: SELECT "Category" FROM "Table" WHERE "Year" = 1998.0 AND "Role/Episode" = 'David Duchovny';