& @ahear
 
  Syntax: @ahear <object> = <command-list>
  Attribute: Ahear
 
  Sets the actions to be taken after the object hears a string that
  matches the pattern in the Listen attribute which was not produced 
  by the object itself.  Messages that are produced by the object 
  itself are ignored.
 
  Example: 
  @ahear clock = "The time is now [time()].  >> BONNNNGGGGG <<
 
  See also: @aahear, @amhear, @listen