I'm quite sure that it's legal to read an article and then write a new article from scratch, containing nothing but the ideas and facts in the first article. (though of course, it may vary over different jurisdictions)
If one is reading several sources and writing a new article combining facts and ideas from several articles, it can even be useful.
i do not have a reference for that specific situational law, but if you find one let me know. I would love to know if that is true or not.