user: Question: Women's singles of Astrid Eidenbenz, and a Men's doubles of no competition is part of mixed doubles?
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: [1986.0, 'Armand Jehle', 'Cornelia Marxer', 'Armand Jehle Markus Becker', 'Cornelia Marxer Astrid Wanger', 'Lothar Iser Astrid Wanger']
SQL:

assistant: SELECT "Mixed doubles" FROM "Table" WHERE "Women's singles" = 'Astrid Eidenbenz' AND "Men's doubles" = 'no competition';