LOL @ Bora!
TJ, would you say poster is a proper name?
Pastorβs age is a singular possessive. But Pastorβs (meaning Pastor is) could pass but it is not really proper grammar. The β βs β to mean βisβ is best used only with with pronouns, like: Sheβs gone, Itβs lateβ¦ but not with proper names.
I take it you are from the quote above? Proper nouns (or names) should begin with a capital letter, as in James, John, Chardonnay, Chanel or Dior. I don't think you would use Poster in the middle of a sentence, but 'poster'. Poster is a noun and wouldn't have a capital letter, poster's age would refer to the age of a single poster, but posters' ages would be said to describle the age of more than one poster.
You can be excused as you left school ages ago! LOL π
It will just be my luck for Dillon to come on now and prove me wrong. π