Edwina Cynthia Annette Mountbatten, Countess Mountbatten of Burma, ("née" Ashley; 28 November 1901 – 21 February 1960) was an English heiress, socialite, relief worker and the last Vicereine of India as wife of Louis Mountbatten, 1st Earl Mountbatten of Burma.
Edwina Cynthia Annette Mountbatten is no longer alive.
It's definitely correct because the text says she died in 1960. I don't think the system can answer this because it's not directly written that she died in 1960, but it's implied by the birth date- death date construction, which the system might not be familiar with.