(S 
    (NP (NNP Commonwealth) (NNP Edison) (NNP Co.) )
    (VP (VBD was) 
      (VP (VBN ordered) 
        (NP (-NONE- *) )
        (S 
          (NP (-NONE- *) )
          (VP (TO to) 
            (VP (VB refund) 
              (NP 
                (QP (IN about) ($ $) (CD 250) (CD million) )
                (-NONE- *U*) )
              (PP (TO to) 
                (NP (PRP$ its) (JJ current) 
                  (CC and)
                  (JJ former) (NNS ratepayers) ))
              (PP (IN for) 
                (NP 
                  (NP (JJ illegal) (NNS rates) )
                  (VP (VBN collected) 
                    (NP (-NONE- *) )
                    (PP (IN for) 
                      (NP 
                        (NP (NN cost) (NNS overruns) )
                        (PP (IN on) 
                          (NP (DT a) (JJ nuclear) (NN power) (NN plant) ))))))))))))
    (. .))
(S 
    (S 
      (NP (DT The) (NN refund) )
      (VP (VBD was) 
        (ADJP 
          (ADJP 
            (NP 
              (QP (IN about) ($ $) (CD 55) (CD million) )
              (-NONE- *U*) )
            (JJR more) )
          (SBAR (IN than) 
            (S 
              (NP (-NONE- *) )
              (ADVP (RB previously) )
              (VP (VBN ordered) 
                (NP (-NONE- *) )
                (PP (IN by) 
                  (NP (DT the) (NNP Illinois) (NNP Commerce) (NNP Commission) ))))))))
    (CC and) 
    (S 
      (NP (NN trade) (NNS groups) )
      (VP (VBD said) 
        (SBAR (-NONE- 0) 
          (S 
            (NP (Prp it) )
            (VP (MD may) 
              (VP (VB be) 
                (NP 
                  (NP (DT the) (JJS largest) )
                  (VP 
                    (ADVP (RB ever) )
                    (VBN required) 
                    (NP (-NONE- *) )
                    (PP (IN of) 
                      (NP (DT a) 
                        (UCP (NN state) (CC or) (JJ local) )
                        (NN utility) ))))))))))
    (. .))