Best way to get articles content

Hello. First of all, my english is not good – but I hope you understand what I mean. Also, I hope that is the right category for my question.
I can not seem to figure out which is the best way to extract the content of the articles. I mean content articles on news sites such as CNN, BBC, Mashable and so on. Maybe something like Readability (but even that does not always work and anyway, I don't know how it is possible to make something similar).
The first thing that crossed my mind was RSS….
Best way to get articles content

See original post by Usetelm