['he', 'begin', 'advance', 'EmptyParameter', 'EmptyParameter'] ['he', 'advance', 'EmptyParameter', 'they', 'on']
['<PRP>', 'begin-55.1-1-1', 'other_cos-45.4', 'EmptyParameter', 'EmptyParameter'] ['<PRP>', 'other_cos-45.4', 'EmptyParameter', '<PRP>', 'on']
He can not and the drones fan out and begin to advance on them.
<PRP> can not and the Synset('wind_instrument.n.01') Synset('person.n.01') out and begin to advance on <PRP>.