user: Question: Name the women's singles for 1991
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, 'Mark Leadbeater', 'Sally Podger', 'Steve Watson Ian Goodfellow', 'Sally Podger Wendy Luxton', 'Steve Watson Jean Lawson']
SQL:

assistant: SELECT "Women's singles" FROM "Table" WHERE "Year" = 1991.0;