['he', 'use', 'metronome', 'metaphor', 'as']
['<PRP>', 'spend_time-104', "Synset('apparatus.n.01')", "Synset('rhetorical_device.n.01')", 'as']
He uses the metronome as a metaphor for the order.
<PRP> uses the Synset('apparatus.n.01') as a Synset('rhetorical_device.n.01') for the Synset('activity.n.01').