she 's a pretty woman , but she 's no working girl 
(ROOT (S (S (NP (PRP she)) (VP (VBZ 's) (NP (DT a) (JJ pretty) (NN woman)))) (, ,) (CC but) (S (NP (PRP she)) (VP (VBZ 's) (NP (DT no) (NN working) (NN girl))))))
(ROOT (S (S (NP (PRP )) (VP (VBZ ) (NP (DT ) (JJ ) (NN )))) (, ) (CC ) (S (NP (PRP )) (VP (VBZ ) (NP (DT ) (NN ) (NN ))))))