['she', 'go', 'study', 'EmptyParameter', 'EmptyParameter'] ['she', 'study', 'they', 'EmptyParameter', 'EmptyParameter']
['<PRP>', 'escape-51.1-1', 'discover-84-1-1', 'EmptyParameter', 'EmptyParameter'] ['<PRP>', 'discover-84-1-1', '<PRP>', 'EmptyParameter', 'EmptyParameter']
She's going to study them.
She's going to study <PRP>.