user: Question: what game had a doubles round in 1979
Columns: ['Year', "Men's singles", "Women's singles", "Men's doubles", "Women's doubles", 'Mixed doubles']
Types: ['real', 'text', 'text', 'text', 'text', 'text']
Sample row: [1977.0, 'Kurt Duschek', 'Barbara Baker', 'Kurt Duschek Karl Klammsteiner', 'Margitt Grittner Rita Blaas', 'Kurt Duschek Rita Blaas']
SQL:

assistant: SELECT "Mixed doubles" FROM "Table" WHERE "Year" = 1979.0;