['he', 'become', 'stepfather', 'EmptyParameter', 'EmptyParameter']
['<PRP>', 'become-109.1-1-1', '<PERSON>24', 'EmptyParameter', 'EmptyParameter']
He will thus become the stepfather of her son, Brax.
<PRP> will thus become the <PERSON>24 of <PRP> son, <LOCATION>12.