['guard', 'retreat', 'EmptyParameter', 'distance', 'to']
["Synset('unit.n.03')", 'escape-51.1-1', 'EmptyParameter', "Synset('measure.n.02')", 'to']
The guard has retreated to a safe distance.
the Synset('unit.n.03') has retreated to a Synset('safe.a.03') Synset('measure.n.02').