['order', 'sign', 'EmptyParameter', 'superior', 'by']
["Synset('manner.n.01')", 'image_impression-25.1', 'EmptyParameter', "Synset('person.n.01')", 'by']
The order is signed by his superiors.
the Synset('manner.n.01') is signed by <PRP> Synset('person.n.01').