['alien', 'realize', 'EmptyParameter', 'threat', 'EmptyParameter']
["Synset('entrant.n.03')", 'discover-84', 'EmptyParameter', "Synset('informing.n.02')", 'EmptyParameter']
The aliens realize that the two are not a threat.
the Synset('entrant.n.03') realize that the <NUMBER>0 are not a Synset('informing.n.02').