['they', 'experience', 'ghost', 'EmptyParameter', 'EmptyParameter'] ['they', 'discover', 'EmptyParameter', 'EmptyParameter', 'EmptyParameter']
['<PRP>', 'sight-30.2', "Synset('illusion.n.01')", 'EmptyParameter', 'EmptyParameter'] ['<PRP>', 'discover-84', 'EmptyParameter', 'EmptyParameter', 'EmptyParameter']
On the planet, they experience some ghosts and soon discover.
on the planet, <PRP> experience some Synset('illusion.n.01') and soon discover.