['she', 'keep', 'everything', 'EmptyParameter', 'EmptyParameter'] ['everything', 'happen', 'EmptyParameter', 'herself', 'to']
['<PRP>', 'keep-15.2', 'everything', 'EmptyParameter', 'EmptyParameter'] ['everything', 'occur-48.3-1', 'EmptyParameter', '<PRP>', 'to']
It would be best if she kept everything that happened to herself.
<PRP> would be best if <PRP> kept everything that happened to <PRP>.