['they', 'test', 'virus', 'prisoner', 'on']
['<PRP>', 'assessment-34.1', "Synset('program.n.07')", "Synset('person.n.01')", 'on']
They tested the virus on prisoners first.
<PRP> tested the Synset('program.n.07') on Synset('person.n.01') <ORDINAL>0.