user: Question: Name the number of years for womens doubles being  Diana Koleva Emilia Dimitrova and  Jeliazko Valkov
Columns: ['Year', 'Mens singles', 'Womens singles', 'Mens doubles', 'Womens doubles', 'Mixed doubles']
Types: ['real', 'text', 'text', 'text', 'text', 'text']
Sample row: [1985.0, 'Jeliazko Valkov', 'Diana Koleva', 'Ilko Orechov Nanko Ertchopov', 'Diana Koleva Zlatka Valkanova', 'Jeliazko Valkov Dobrinka Peneva']
SQL:

assistant: SELECT COUNT("Year") FROM "Table" WHERE "Womens doubles" = 'Diana Koleva Emilia Dimitrova' AND "Mens singles" = 'Jeliazko Valkov';