['they', 'discover', 'it', 'EmptyParameter', 'EmptyParameter'] ['they', 'break', 'it', 'EmptyParameter', 'EmptyParameter']
['<PRP>', 'discover-84', '<PRP>', 'EmptyParameter', 'EmptyParameter'] ['<PRP>', 'break-45.1', '<PRP>', 'EmptyParameter', 'EmptyParameter']
They discovered it, and were unable to break it.
<PRP> discovered it, and were Synset('unable.a.01') to break <PRP>.