user: Question: Who won the mixed doubles in 1998?
Columns: ['Year', 'Mens singles', 'Womens singles', 'Mens doubles', 'Womens doubles', 'Mixed doubles']
Types: ['real', 'text', 'text', 'text', 'text', 'text']
Sample row: [1992.0, 'Marko Goljak', 'Andrea Jurcic', 'No competition', 'No competition', 'No competition']
SQL:

assistant: SELECT "Mixed doubles" FROM "Table" WHERE "Year" = 1998.0;