Update README.md

README.md

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 license: cc0-1.0
+language:
+- en
+- ja
+size_categories:
+- n<1K
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+Images trained for my [phantom diffusion](https://huggingface.co/Phantom-Artist/phantom-diffusion) series.
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+Since they are all AI generated images that are public domain under the US law, I claim it is legal to redistribute them as public domain.
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+However, they might have copyright in your/their original country.
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+Still, many countries including Japan allow us to use them for training an AI under their copyrights law, and because all the artists here are from Japan, I assume it should be allowed to reuse it for training globally.