user: Question: who won the women's singles in 1992?
Columns: ['Year', "Men's singles", "Women's singles", "Men's doubles", "Women's doubles", 'Mixed doubles']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['1932', 'J. P. H. Woltman', 'Mence Dros-Canters', 'J. P. H. Woltman Dirk Stikker', 'Mence Dros-Canters K. Pabst', 'J. P. H. Woltman Mence Dros-Canters']
SQL:

assistant: SELECT "Women's singles" FROM "Table" WHERE "Year" = '1992';