user: Question: Who won men's singles when Petya Nedelcheva won women's singles, Petya Nedelcheva Diana Dimova won women's doubles, Stilian Makarski Diana Dimova won mixed doubles, and Stilian Makarski Peyo Boichinov won men's 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: [1985.0, 'Jeliazko Valkov', 'Diana Koleva', 'Ilko Orechov Nanko Ertchopov', 'Diana Koleva Zlatka Valkanova', 'Jeliazko Valkov Dobrinka Peneva']
SQL:

assistant: SELECT "Men's singles" FROM "Table" WHERE "Women's singles" = 'Petya Nedelcheva' AND "Women's doubles" = 'Petya Nedelcheva Diana Dimova' AND "Mixed doubles" = 'Stilian Makarski Diana Dimova' AND "Men's doubles" = 'Stilian Makarski Peyo Boichinov';