['factor', 'use', 'EmptyParameter', 'indicator', 'as']
["Synset('series.n.01')", 'use-105.1', 'EmptyParameter', "Synset('material.n.01')", 'as']
They aren't responsible for changing the factor which is used as an indicator.
<PRP> aren't Synset('responsible.a.01') for changing the Synset('series.n.01') which is used as an Synset('material.n.01').