CREATE TABLE table_80384 ("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 doubles in the year that Jesper Knudsen Nettie Nielsen won the Mixed doubles?
SELECT "Women's doubles" FROM table_80384 WHERE "Mixed doubles" = 'jesper knudsen nettie nielsen'
SELECT "Women's doubles" FROM "table_80384" WHERE "Mixed doubles" = 'jesper knudsen nettie nielsen'