Use it when you want to talk of a property of an object. If the object you talk about is a ring, you may want to talk about its weight, its size, etc. - texts like the weight of the ring, its size, etc.
will output la largeur de la bague / son poids.
thirdPossession takes an optional last parameter that is sent as is to the subject.
In Englis you can add
OF (default) to generate texts like the width of the ring or
S for the ring’s width.
In German you can indicate the case:
will output: die Gurke: 8 cm ist ihres Durchmessers, grün ist ihrer Farbe.
addToParams is required here so that the case is conveyed through the call stack.
You can use