Does anyone know if Leon Theremin's daughter Natalia knew how to play the theremin well?

Some years ago I saw a documentary, but I'm not sure whether if it was her or not.

Also, if in fact she did play it well, I ask anyone who has a photo of her playing the instrument, or knows about a video in which she does so, to show it to me.

Thank you all very much for your eventual help.

I have the same question, recently i've read the interview done by Olivia Mattis and there speaks Natalia theremin as well (Nathasha Termen), i don't mind if she was a remarkable thereminist, i just want to know her works with the Thereminvox and some photo, here you have some of her

http://prometheus.kai.ru/term_e.htm

http://www.137.com/gallery/natasha.gif

on the second is very clear that she is one daughter, Elena is her sister (twin), and one can see the Theremin made by himself Leon Theremin. (on his words: "...a good thereminvox...")

yes, she plays it. For the release of the Gakken mini theremin from Japan, they interviewed her, and made her play the gakken mini and an etherwave (although it was very bancal).
I can't find the videos anymore but they are somewhere.
You can see pictures on the small book with the theremin mini (but in Japanese).

oops, sorry, no, it was Helena, not Natalia.
You can see the video there :
http://otonanokagaku.net/feature/vol10/index.html

WOW, what a piece of history. Thank you very much!

I understand.
Luckily I can read Japanese.
I didn't know she had a twin sister; probably that is the daughter I wanted to know more about.
Thank you very much for your help.
If anyone should find more information; please let me know.