[boxy310]

>Anaphora resolution is one of the really hard problems not only in NLP but in linguistics in general.

This was one of the most frustrating parts of studying Latin rhetoric. The speakers would keep referring to "That thing I was talking about," and it's a noun from a subordinate clause 2 and a half paragraphs ago.

[kuschku]

That’s actually very common in most languages. English is one of the few western languages that doesn’t do this, which makes it quite complicated for some people to write sentences in it, as in their native language such far backreferences, and long run-on sentences may be a lot more common.