['he', 'say', 'EmptyParameter', 'EmptyParameter', 'EmptyParameter'] ['he', 'keep', 'ship', 'slipstream', 'in']
['<PRP>', 'say-37.7-1-1', 'EmptyParameter', 'EmptyParameter', 'EmptyParameter'] ['<PRP>', 'keep-15.2', "Synset('craft.n.02')", "Synset('natural_process.n.01')", 'in']
He had merely said that he couldn't keep the ship in the slipstream.
<PRP> had merely said that <PRP> couldn't keep the Synset('craft.n.02') in the Synset('natural_process.n.01').