1:- module(roles,[role/2]).    2
    3% see: Bonial et al. 
    4
    5role('Agent','Actor in an event who initiates and carries out the event intentionally or consciously and exists independently of the event.').
    6role('Amount','').
    7role('Attribute','Undergoer that is a property of an entity.').
    8role('Beneficiary','Undergoer in a state or an event that is potentially advantaged or disadvantaged by it.').
    9role('Cause',''0.
   10role('Partner','')