['they', 'enter', 'system', 'EmptyParameter', 'EmptyParameter'] ['they', 'investigate', 'extent', 'EmptyParameter', 'EmptyParameter']
['<PRP>', 'escape-51.1-1-2', "Synset('body.n.01')", 'EmptyParameter', 'EmptyParameter'] ['<PRP>', 'assessment-34.1', "Synset('property.n.02')", 'EmptyParameter', 'EmptyParameter']
They enter the Jefferies tube system and investigate the extent of the affected gel packs.
<PRP> enter the <PERSON>12 Synset('device.n.01') Synset('body.n.01') and investigate the Synset('property.n.02') of the affected Synset('sheet.n.06') Synset('device.n.01').