['they', 'have', 'difficulty', 'EmptyParameter', 'EmptyParameter']
['<PRP>', 'own-100', "Synset('attribute.n.02')", 'EmptyParameter', 'EmptyParameter']
They are having difficulty tracing the transmission.
<PRP> are having Synset('attribute.n.02') tracing the Synset('constant.n.02').