['he', 'step', 'back', 'EmptyParameter', 'EmptyParameter']
['<PRP>', 'run-51.3.2', "Synset('covering.n.02')", 'EmptyParameter', 'EmptyParameter']
He steps away, his back to The Doctor, screaming, anguished.
<PRP> steps away, <PRP> Synset('covering.n.02') to <PERSON>2 Doctor, screaming, anguished.