['he', 'fall', 'EmptyParameter', 'EmptyParameter', 'EmptyParameter']
['<PRP>', 'escape-51.1-1', 'EmptyParameter', 'EmptyParameter', 'EmptyParameter']
He falls back on having to use force to make progress.
<PRP> falls back on having to use Synset('out.n.01') to make Synset('movement.n.03').