['Gralik', 'explain', 'EmptyParameter', 'EmptyParameter', 'EmptyParameter'] ['he', 'know', 'nothing', 'EmptyParameter', 'EmptyParameter']
['<PERSON>2', 'indicate-78', 'EmptyParameter', 'EmptyParameter', 'EmptyParameter'] ['<PRP>', 'comprehend-87.2', "Synset('measure.n.02')", 'EmptyParameter', 'EmptyParameter']
Gralik explains that he knows nothing about Earth, Humans or even the probe.
<PERSON>2 explains that <PRP> knows Synset('measure.n.02') about Earth, Synset('primate.n.02') or even the Synset('medical_instrument.n.01').