['fighter', 'disappear', 'EmptyParameter', 'midst', 'in']
["Synset('heavier-than-air_craft.n.01')", 'disappearance-48.2-1', 'EmptyParameter', "Synset('region.n.01')", 'in']
The fighters, in the midst of battle, disappear, to the angry boos of the crowd.
the fighters, in the Synset('region.n.01') of battle, disappear, to the Synset('angry.a.01') Synset('utterance.n.01') of the Synset('social_group.n.01').