['he', 'leave', 'return', 'EmptyParameter', 'EmptyParameter'] ['he', 'return', 'EmptyParameter', 'he', 'to']
['<PRP>', 'leave-51.2-1', 'convert-26.6.2', 'EmptyParameter', 'EmptyParameter'] ['<PRP>', 'convert-26.6.2', 'EmptyParameter', '<PRP>', 'to']
He leaves to return to his.
<PRP> leaves to return to <PRP>.