In the English language, when we want to convey the idea that John is Jane's son, we might say "John is Jane's son". Or, we might say "Jane is John's mother." What we convey directly is how Jane is related to John. Suppose object A has a property, which is Object B. How can we describe this relationship? Obviously, we can say "object B is a property of object A." Or we could say "Object A has one property, which is Object B." But how can we describe this relationship in a way that resembles the second description of Jane (that she is John's mother)? A few possibilities come to mind: we could call A B's container, or maybe its owner. What other possibilities are there?