['it', 'come', 'EmptyParameter', 'subspace', 'from']
['<PRP>', 'appear-48.1.1', 'EmptyParameter', '<MISC>2', 'from']
It came from subspace, which was still unknown to the science of Kelly's day.
<PRP> came from subspace, which was still Synset('unknown.a.01') to the Synset('cognition.n.01') of Kelly's Synset('cosmic_time.n.01').