UML25 — Location: 9.8.4 Notation p 141 representing the roles vs representing the instances

a bit confusing. It says:
may contain nested rectangles representing the instances playing its roles

Do you mean
may contain nested rectangles representing the roles the instance is playing? Please clarify nearby

Give an example with the roles

In an instance specification for a structured classifier, the nested rectangles do represent instances playing its roles.
There are several examples in clause 11, and clause 9 refers the reader to them with a hyperlink. Moving the structured
examples to clause 9 would make the forward reference problem worse, not better. The current specification text is
accurate as it stands.
Disposition: Closed - No Change