user: Question: Who won the mixed doubles in 1957 when Judy Devlin won the women's singles?
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: [1957.0, 'Dave F. McTaggart', 'Judy Devlin', 'Don K. Smythe H. "Budd" Porter', 'Sue Devlin Judy Devlin', 'Robert B. Williams Ethel Marshall']
SQL:

assistant: SELECT "Mixed doubles" FROM "Table" WHERE "Women's singles" = 'Judy Devlin' AND "Year" = 1957.0;