Thought this might be about the video game series, and even after seeing "Fable 5" my first reaction was "wow, up to 5 already?". It looks like they made it up to Fable III before rebooting the series with a 4th game (well, it's not out yet), so there is no Fable 5 yet.

TFA seems to be about some AI thing. Crazy how many words are actually just AI things now. Learning, reinforcement, language, model...