['they', 'capture', 'EmptyParameter', 'alien', 'by']
['<PRP>', 'steal-10.5', 'EmptyParameter', "Synset('imaginary_being.n.01')", 'by']
They have been captured by aliens, Voyager is unaware of their situation.
<PRP> have been captured by aliens, <VESSEL>3 is Synset('unaware.a.01') of <PRP> Synset('attribute.n.02').