['airplane', 'fly', 'EmptyParameter', 'they', 'at']
["Synset('aircraft.n.01')", 'run-51.3.2', 'EmptyParameter', '<PRP>', 'at']
Three World War II era airplanes, P-51 Mustangs, are flying toward them and firing at them.
three <MISC>3 <TIME>1 airplanes, p-51 Mustangs, are flying toward <PRP> and Synset('operation.n.05') at <PRP>.