['it', 'turn', 'birthday', 'EmptyParameter', 'EmptyParameter']
['<PRP>', 'turn-26.6.1-1', "Synset('day.n.01')", 'EmptyParameter', 'EmptyParameter']
It turns out to be Tuvok's birthday.
<PRP> turns out to be Tuvok's Synset('day.n.01').