Most probably the author knows this but there are some photos and information here [1]. His grandfather is a member of "The Righteous Among the Nations" [2].

[1] https://www.yadvashem.org/righteous/stories/sietsma.html

[2] https://www.yadvashem.org/righteous.html

Thanks for sharing this, I was not aware of it and I’m currently in the process of learning Hebrew, dealing with the intersection of (Jewish and Christian) culture and technology.

One example is a GPT version [1] fine tuned on texts of Sefaria [2].

The initiator was in direct contact with Sam Altman to kickstart it. (Personal communication).

He talks about this publicly [3]

[1]: https://github.com/Sefaria/AppliedAI [2]: https://www.sefaria.org/texts [3]: https://m.youtube.com/watch?v=tZkJl2fk0rc

Good find - Henk and Hein were actually cousins of my grandfather. His eldest two sons (my uncles) were also involved with the resistance, though this only came out recently.