Well if you need to do so, you could use what's already on site for example [1] looking for stories on startups -- it seems to thin out ai.

Actually [2] does ok, of course search doesn't list dead links.

[1] https://hn.algolia.com/?dateRange=all&page=0&prefix=true&que...

[2] https://hn.algolia.com/?dateRange=all&page=0&prefix=true&que...