an Entity references as follows:
Scope note: This property identifies an E90 Symbolic Object carried by an instance of E18 Physical Thing. Examples: - Matthew's paperback copy of Reach for the Sky (E84) carries the text of Reach for the Sky (E73) In First Order Logic: P128(x,y) ⊃ E18(x) P128(x,y) ⊃ E90(y) P128(x,y) ⊃ P130(x,y)