['they', 'scan', 'EmptyParameter', 'barrier', 'below'] ['way', 'be', 'EmptyParameter', 'EmptyParameter', 'EmptyParameter']
['<PRP>', 'assessment-34.1', 'EmptyParameter', "Synset('natural_object.n.01')", 'below'] ["Synset('concept.n.01')", 'seem-109', 'EmptyParameter', 'EmptyParameter', 'EmptyParameter']
They can not scan below the barrier, so, there is no way to know.
<PRP> can not scan below the barrier, so, there is no Synset('concept.n.01') to know.