She was a very good mistress to me, sir.
( She ( ( ( ( was ( ( a ( ( very good ) mistress ) ) ( to me ) ) ) , ) sir ) . ) )
(ROOT (S (NP (PRP She)) (VP (VBD was) (NP (NP (DT a) (ADJP (RB very) (JJ good)) (NN mistress)) (PP (TO to) (NP (PRP me)))) (, ,) (ADVP (RB sir))) (. .)))
She was a good mistress. 
( She ( ( was ( a ( good mistress ) ) ) . ) )
(ROOT (S (NP (PRP She)) (VP (VBD was) (NP (DT a) (JJ good) (NN mistress))) (. .)))