user: Question: What is the women's singles before 1965 with Kaj Lindfors Ann-Louise von Essen being 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: [1955.0, 'Lars Palmen', 'Inger Gerkman', 'Lars Palmen Harry Troupp', 'no competition', 'no competition']
SQL:

assistant: SELECT "Women's singles" FROM "Table" WHERE "Year" < 1965.0 AND "Mixed doubles" = 'Kaj Lindfors Ann-Louise von Essen';