['Tuvok', 'express', 'concern', 'EmptyParameter', 'EmptyParameter']
['<PERSON>2', 'reflexive_appearance-48.1.2', "Synset('stimulation.n.02')", 'EmptyParameter', 'EmptyParameter']
Tuvok expresses his concern.
<PERSON>2 expresses <PRP> Synset('stimulation.n.02').