['they', 'need', 'reach', 'EmptyParameter', 'EmptyParameter'] ['they', 'reach', 'undetected', 'EmptyParameter', 'EmptyParameter']
['<PRP>', 'want-32.1', 'reach-51.8', 'EmptyParameter', 'EmptyParameter'] ['<PRP>', 'reach-51.8', "Synset('undetected.a.01')", 'EmptyParameter', 'EmptyParameter']
They will still need to reach the surface undetected.
<PRP> will still need to reach the Synset('feature.n.01') Synset('undetected.a.01').