['he', 'promise', 'leave', 'EmptyParameter', 'EmptyParameter'] ['he', 'leave', 'system', 'EmptyParameter', 'EmptyParameter']
['<PRP>', 'promise-37.13', 'leave-51.2-1', 'EmptyParameter', 'EmptyParameter'] ['<PRP>', 'leave-51.2-1', "Synset('artifact.n.01')", 'EmptyParameter', 'EmptyParameter']
In return, he promises to leave their system as soon.
in return, <PRP> promises to leave <PRP> Synset('artifact.n.01') as soon.