Scope note: This property defines the kind of objects used in an E7 Activity, when the specific instance is either unknown or not of interest, such as use of "a hammer". Examples: - at the Battle of Agincourt (E7), the English archers used object of type long bow (E55) In First Order Logic: P125(x,y) ⊃ E7(x) P125(x,y) ⊃ E55(y)