#260531-021718-315000 - Days of Glory

A trivia item states the last living cast member will turn 100 next year. In researching the actor, I discovered that there is no information available on her (Dena Penn) after 1945, the year of her last film appearance. Information from internet searches include: "No confirmed death date, family details, marriage, or later occupation have been recorded in accessible sources." "done quite a lot of research on this young lady and I very sorry to say I can not find anything on her which is very unusual. She's literally vanished it seems." 

I found it somewhat ludicrous that a statement positively averring a woman to be living at 99 years of age, when there has been no information about her in over 80 years is allowed to be listed in IMDb without any qualification. Please tell me how my additional information does not meet IMDb's contribution guidelines.