['he', 'hear', 'voice', 'EmptyParameter', 'EmptyParameter']
['<PRP>', 'discover-84', "Synset('linguistic_relation.n.01')", 'EmptyParameter', 'EmptyParameter']
Occasionally, he hears German voices.
Occasionally, <PRP> hears Synset('german.a.01') Synset('linguistic_relation.n.01').