['he', 'start', 'use', 'spectrum', 'EmptyParameter'] ['he', 'find', 'EmptyParameter', 'EmptyParameter', 'EmptyParameter']
['<PRP>', 'terminus-47.9', 'use-105.1', "Synset('extent.n.02')", 'EmptyParameter'] ['<PRP>', 'declare-29.4', 'EmptyParameter', 'EmptyParameter', 'EmptyParameter']
He then started using different radioactive spectra, and found.
<PRP> then started using Synset('unlike.a.01') Synset('radioactive.a.01') spectra, and found.