['she', 'express', 'frustration', 'EmptyParameter', 'EmptyParameter']
['<PRP>', 'send-11.1', "Synset('anger.n.01')", 'EmptyParameter', 'EmptyParameter']
She expresses her frustration at trying to understand Seven's actions.
<PRP> expresses <PRP> Synset('anger.n.01') at trying to understand Seven's Synset('device.n.01').