['computer', 'begin', 'warn', 'EmptyParameter', 'EmptyParameter']
["Synset('device.n.01')", 'begin-55.1-1-1', 'advise-37.9', 'EmptyParameter', 'EmptyParameter']
Then the computer began warning of oxygen depletion.
then the Synset('device.n.01') began warning of Synset('substance.n.01') Synset('state.n.02').