That’s not how it works - the original author of the input owns the copyright for the work and if the output of the LLM is the same or a close derivative, the that copyright will be infringed. The ruling only means that YOU can not claim copyright for something that LLM spit out and you put your name on.

Judging by the text, it is definitely older than 1960, since they refer to that year as the future. The model seems to have come out in 1957.

Prussian Kingdom was technically one state in the German Empire. But since the Prussian king was the emperor, distinction between them was somewhat artificial.

Pre-Balkan wars even.