[mark_element]

It doesn't do well on the classic: https://en.wikipedia.org/wiki/Buffalo_buffalo_Buffalo_buffal...

[yongjik]

To be fair, if someone actually utters that sentence, I think most English speakers would reply with "I'm sorry?" or "Do you need help?"

[Borating]

See the video TED-Ed Buffalo buffalo buffalo: One-word sentences and how they work - Emma Bryce [1]

[1] https://www.youtube.com/watch?v=TWbzjGIec20

[muthdra]

But it does try it's very best on: https://en.wikipedia.org/wiki/James_while_John_had_had_had_h...