user: Question: who is the the mens singles with mens doubles being Kaj Lindfors Kaj Osterberg
Columns: ['Year', 'Mens singles', 'Womens singles', 'Mens doubles', 'Womens doubles', 'Mixed doubles']
Types: ['real', 'text', 'text', 'text', 'text', 'text']
Sample row: [1955.0, 'Lars Palmen', 'Inger Gerkman', 'Lars Palmen Harry Troupp', 'no competition', 'no competition']
SQL:

assistant: SELECT "Mens singles" FROM "Table" WHERE "Mens doubles" = 'Kaj Lindfors Kaj Osterberg';