Just a list of domains compiled by a guy. If you want to know more about the level of thinking behind the list of domains, this[1] page linked from the BS detector readme gives the general idea.

I would say it's the product of a very earnest idealist who thinks he has solved the problem because he hasn't spent enough time thinking about the problem to understand the ways in which it is non-trivial.

https://www.inverse.com/article/23781-bs-detector-facebook-f...

That list is not just fake news but also ones with extreme bias. Source: the domain classifications in the project readme.

Following the link, here's the source: https://github.com/selfagency/bs-detector/blob/master/chrome...

As per the author of the dataset on kaggle:

    contains text and metadata scraped from 244 websites
    tagged as "bullshit" here by the BS Detector Chrome Extension
    by Daniel Sieradski. Warning: I did not modify the list
    of news sources from the BS Detector so as not to introduce
    my (useless) layer of bias