English is my 2nd language, so I might not have expressed my question clearly enough.
The question is, if I wanna refer to certain kind of things as plurals, and if they're composed of multiple nouns, only the last noun should be plural? For instance:
She's daughter of immigrant parents.
He has outdone all his shop-owner peers.
I hope you can see what I mean. I don't know how to express my question properly.
Remember - if you don't use correct capitalisation, punctuation and spacing, anything you write will be incorrect.