I'm not sure about links directly to court cases, but here's a couple different general-consumption articles from the last few years that address this sort of thing. I'm hopeful I didn't convey that the consensus on the subject is particularly solid...
Thanks for the links. I know little on the topic. It may be a while before a litigious content owner identifies their work as having contributed to another generated one. I have yet to see in-your-face examples being monetized.
From a technical standpoint using copyrighted text to train a text translator is similar to using copyrighted movies to train a movie generator. Which of these are acceptable?
[1] https://qz.com/1054039/google-deepdream-art-if-an-ai-creates...
[2] https://www.scmp.com/tech/start-ups/article/3042811/legal-ex...