Definition:
        Actor in an event who initiates and carries out the event intentionally or consciously, and who exists independently of the event.
        Example:
        THEY decided to go.
        
      
     
    
      Agent
    
      
       
   
    
      [
      
        +animate
         |
      
        +organization
        
      
    ]
    
    
    
    
  
     
    
    
      
      
        Definition:
        An Undergoer in an event that is usually structurally changed, for instance by experiencing a change of state or condition; is often acted upon by an agent; is causally involved or directly affected by other participants; and exists independently of the event.
        Example:
        Brutus murdered JULIUS CAESAR.
        
      
     
    
      Patient
    
      
       
   
    
      [
      
        +animate
         |
      
        +organization
        
      
    ]
    
    
    
    
  
     
    
    
      
      
        Definition:
        Undergoer in an event that is manipulated by an agent, and with which an intentional act is performed; it exists independently of the event. For all roles containing symmetrical participants, we assume that the ordering is non-arbitrary and may be pragmatically determined and/or related to figure-ground considerations; however, the usefulness of this distinction may be application-specific.
        Example:
        Jennifer baked the potatoes IN THE OVEN.
        
      
     
    
      Instrument