['they', 'know', 'EmptyParameter', 'EmptyParameter', 'EmptyParameter'] ['what', 'make', 'EmptyParameter', 'it', 'of']
['<PRP>', 'comprehend-87.2', 'EmptyParameter', 'EmptyParameter', 'EmptyParameter'] ['what', 'build-26.1', 'EmptyParameter', '<PRP>', 'of']
They know not what to make of it.
<PRP> know not what to make of <PRP>.