['they', 'determine', 'EmptyParameter', 'EmptyParameter', 'EmptyParameter'] ['what', 'do', 'EmptyParameter', 'it', 'to']
['<PRP>', 'discover-84', 'EmptyParameter', 'EmptyParameter', 'EmptyParameter'] ['what', 'act-114', 'EmptyParameter', '<PRP>', 'to']
They can not determine what has been done to it.
<PRP> can not determine what has been done to <PRP>.