I suspect this is a hard problem and that deep learning is the state of the art. But maybe I'm missing something?
Just to be clear, given the html of a wapo article I want to discard all the affiliate links/comments and focus on the article text. I want a generalized solution for many blogs and news sites.
I've had some good luck with "Unfluff"[0], a credible Node.js package that uses a cascade of logical conditions to figure out what to extract.
It's a very practical start.
I thought the science of it was called "envelope detection" but I'm not getting any relevant hits on that keyword. Will report back if I recall the name.