an equally beautiful , self-satisfied 18-year-old mistress 
(ROOT (NP (DT an) (ADJP (RB equally) (JJ beautiful)) (, ,) (ADJP (NN self) (HYPH -) (JJ satisfied)) (ADJP (NP (CD 18) (HYPH -) (NN year)) (HYPH -) (JJ old)) (NN mistress)))
(ROOT (NP (DT ) (ADJP (RB ) (JJ )) (, ) (ADJP (NN ) (HYPH ) (JJ )) (ADJP (NP (CD ) (HYPH ) (NN )) (HYPH ) (JJ )) (NN )))