@FantasticExpansiveMoney a proportion is like a ratio: For example, if we say your proportion of fat calories in your diet is 1:3 to protein, then your diet consists 1 part (can be a percentage) of fat and 3 parts of protein.

"A library in a digital-first community finds that it is unable to lend its printed books and so displays them only when requested for an exhibition."

--> Would "it " be the new subject of the Object clause if we were trying to dissect the object clause into Subject &Predicate?

@AlenaKane Yup, I made the same mistake. I intentionally did not seperate it because the previous cat example where the cat "likes to drink" (Predicate Verb) wasn't seperated either.

[Noun] "trained by Parisian divas"[Verb] --> is everything that stands between the Noun and the Verb of the (Predicate) considered as a modifier/descriptor?