def mutator_show_noun_only(nocaption=False):
    """Mutate the image to show the noun only.  
    
    Args:
        nocaption: [bool] If true, then do not display the caption, only consistently colored boxes for the noun. 
    
    ..note:: To color boxes by track rather than noun, use `vipy.image.mutator_show_trackonly`
    """
    return lambda im, k=None: (im.objectmap(lambda o: o.shortlabel('\n'.join([('__'+n if nocaption else n) for (n,v) in o.attributes['__noun verb']])) if o.hasattribute('__noun verb') else o))