['shield', 'surround', 'plexus', 'EmptyParameter', 'EmptyParameter']
['<OBJECT>0', 'fill-9.8-1', "Synset('body_part.n.01')", 'EmptyParameter', 'EmptyParameter']
It is unable to due to the shields that surround the central plexus.
<PRP> is Synset('unable.a.01') to Synset('due.a.03') to the <OBJECT>0 that surround the Synset('central.a.02') Synset('body_part.n.01').