a way of removing duplicate articles

[mircealungu]

we really need to remove duplicates: when a popular news item hits the news, we get a lot of sources writing about it and it appears too many times in the feed:

• https://www.zeeguu.org/read/article?id=3390906
• https://www.zeeguu.org/read/article?id=3390853

or is it enuogh that the learner can "hide" and article and then in such situations, he'll hide three and be done with it?