['he', 'have', 'difficulty', 'EmptyParameter', 'EmptyParameter']
['<PRP>', 'own-100', "Synset('attribute.n.02')", 'EmptyParameter', 'EmptyParameter']
He's having difficulty determining the cause of their infection using standard scans.
He's having Synset('attribute.n.02') determining the Synset('beginning.n.01') of <PRP> Synset('organic_process.n.01') using Synset('standard.a.01') Synset('investigation.n.02').