As long as you cite the originals you should be fine. Data per se can't be copyrighted and citation removes the possible charge of plagiarism (unlikely in any case, here).

Just be clear about the origins and what you have done with it.

As long as you cite the originals you avoid plagiarism. Citation removes the possible charge of plagiarism (unlikely in any case, here).

Just be clear about the origins and what you have done with it.

Also ask whether the license is even appropriate. In other words, does the dataset have enough "creative content" that it is copyrightable? Data per se can't be copyrighted. Only creative works can be. If it can't be copyrighted, then it can't be licensed. I don't have enough information here to help you make that judgement. But it would probably be good to make a conservative judgement.

But, you can also ask the authors for a more permissive license for your use if needed. They can do that for a copyrighted work.

The other question, of course, is how you intend to publish it and whether any publisher would be willing to work with you and consider your contribution worth publishing. This, of course, revolves around the issue of whether you have any creative content in the dataset.