['he', 'keep', 'they', 'EmptyParameter', 'EmptyParameter'] ['he', 'look', 'intimidate', 'EmptyParameter', 'EmptyParameter']
['<PRP>', 'keep-15.2', '<PRP>', 'EmptyParameter', 'EmptyParameter'] ['<PRP>', 'seem-109', 'amuse-31.1', 'EmptyParameter', 'EmptyParameter']
He should keep them -- as he looks intimidating.
<PRP> should keep <PRP> -- as <PRP> looks intimidating.