['ship', 'lock', 'EmptyParameter', 'they', 'onto']
["Synset('craft.n.02')", 'tape-22.4', 'EmptyParameter', '<PRP>', 'onto']
The alien ship has locked onto them with what is presumably a tractor beam.
the alien Synset('craft.n.02') has locked onto <PRP> with what is presumably a Synset('motor_vehicle.n.01') Synset('surface.n.01').