['they', 'hide', 'technology', 'EmptyParameter', 'EmptyParameter']
['<PRP>', 'concealment-16-1', "Synset('use.n.01')", 'EmptyParameter', 'EmptyParameter']
They have been careful to hide any new technology.
<PRP> have been Synset('careful.a.01') to hide any Synset('new.a.01') Synset('use.n.01').