['air', 'replace', 'EmptyParameter', 'somberness', 'by']
["Synset('location.n.01')", 'substitute-13.6.2', 'EmptyParameter', "Synset('fear.n.01')", 'by']
The air of joyous celebration has been replaced by somberness.
the Synset('location.n.01') of Synset('joyous.a.01') Synset('practice.n.01') has been replaced by Synset('fear.n.01').