I like your project and the thinking that you've put into it. I feel that if you carry forward your thought of comparing several news headlines, scraped from more than just 2 RSS feeds, you are basically on track to creating a full-blown news aggregator. So why not?

I'm scraping 2 RSS feeds for each network and then storing them in the db.

After some time the list of headlines piles up and we can check which network mentions thing x and compare it to how often the other networks mention that thing also.

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