Scope note: This property identifies E57 Material employed in an E11 Modification. The E57 Material used during the E11 Modification does not necessarily become incorporated into the E24 Physical Man-Made Thing that forms the subject of the E11 Modification. Examples: - the repairing of the Queen Mary (E11) employed Steel (E57) - distilled water (E57) was employed in the restoration of the Sistine Chapel (E11) In First Order Logic: P126(x,y) ⊃ E11(x) P126(x,y) ⊃ E57(y)