How to derive a relationship from a polymorphic pivot table?

Question

Laravel

Hello.
There is such structure of tables.

events is connected through personable (polymorphic relationship) with persons, and that, in turn, has roles through person_role. These roles I get like this

$event->persons()->with('roles')->paginate($paginate)

The problem is that each persons has a role that is tied to a specific event, and for this relationship, many to many is used from the personable polymorphic table.
How can I get the list of roles through a relationship from a polymorphic table?