['he', 'begin', 'doubt', 'EmptyParameter', 'EmptyParameter'] ['he', 'doubt', 'himself', 'EmptyParameter', 'EmptyParameter']
['<PRP>', 'begin-55.1-1-1', 'judgment-33.1', 'EmptyParameter', 'EmptyParameter'] ['<PRP>', 'judgment-33.1', '<PRP>', 'EmptyParameter', 'EmptyParameter']
However, he begins to doubt himself.
However, <PRP> begins to doubt <PRP>.