['they', 'build', 'chamber', 'EmptyParameter', 'EmptyParameter']
['<PRP>', 'calibratable_cos-45.6.1', "Synset('structure.n.04')", 'EmptyParameter', 'EmptyParameter']
They had built a multiphasic force field chamber in the Equinox'research lab to trap one for several minutes.
<PRP> had built a multiphasic Synset('out.n.01') Synset('natural_phenomenon.n.01') Synset('structure.n.04') in the Equinox'research Synset('geographic_point.n.01') to Synset('mechanism.n.05') one for <DURATION>3.