user: Question: Men's singles of Kilian Pfister, and a Women's doubles of Astrid Eidenbenz Claudia Jehle has what average year?
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 AVG("Year") FROM "Table" WHERE "Men's singles" = 'Kilian Pfister' AND "Women's doubles" = 'Astrid Eidenbenz Claudia Jehle';