['it', 'become', 'harder', 'EmptyParameter', 'EmptyParameter'] ['it', 'call', 'EmptyParameter', 'EmptyParameter', 'EmptyParameter']
['<PRP>', 'become-109.1-1-1', 'harder', 'EmptyParameter', 'EmptyParameter'] ['<PRP>', 'animal_sounds-38', 'EmptyParameter', 'EmptyParameter', 'EmptyParameter']
It is becoming harder and harder, and has not called in.
<PRP> is becoming harder and harder, and has not called in.