['they', 'test', 'molecule', 'molecule', 'by']
['<PRP>', 'assessment-34.1', "Synset('thing.n.12')", "Synset('thing.n.12')", 'by']
They have tested the drive molecule by molecule.
<PRP> have tested the Synset('movement.n.11') Synset('thing.n.12') by Synset('thing.n.12').