CREATE TABLE table_15771 ("Year" TEXT, "Men's singles" TEXT, "Women's singles" TEXT, "Men's doubles" TEXT, "Women's doubles" TEXT, "Mixed doubles" TEXT)

Who won the Women's singles in 2013?
SELECT "Women's singles" FROM table_15771 WHERE "Year" = '2013'
SELECT "Women's singles" FROM "table_15771" WHERE "Year" = '2013'