['phenomenon', 'expand', 'EmptyParameter', 'rate', 'at']
["Synset('change.n.01')", 'other_cos-45.4', 'EmptyParameter', "Synset('quotient.n.01')", 'at']
The phenomenon must be expanding at an accelerated rate.
the Synset('change.n.01') must be expanding at an accelerated Synset('quotient.n.01').