This is my old friend, Monsieur Poirot, whom I have not seen for years."
( This ( ( ( is ( ( ( ( ( my ( old friend ) ) , ) ( Monsieur Poirot ) ) , ) ( whom ( I ( ( have not ) ( seen ( for years ) ) ) ) ) ) ) . ) '' ) )
(ROOT (S (NP (DT This)) (VP (VBZ is) (NP (NP (PRP$ my) (JJ old) (NN friend)) (, ,) (NP (NNP Monsieur) (NNP Poirot)) (, ,) (SBAR (WHNP (WP whom)) (S (NP (PRP I)) (VP (VBP have) (RB not) (VP (VBN seen) (PP (IN for) (NP (NNS years))))))))) (. .) ('' '')))
Monsieur Poirot is a long time enemy of mine; I hate her. 
( ( ( ( ( Monsieur Poirot ) ( is ( ( a ( long ( time enemy ) ) ) ( of mine ) ) ) ) ; ) ( I ( hate her ) ) ) . )
(ROOT (S (S (NP (NNP Monsieur) (NNP Poirot)) (VP (VBZ is) (NP (NP (DT a) (JJ long) (NN time) (NN enemy)) (PP (IN of) (NP (NN mine)))))) (: ;) (S (NP (PRP I)) (VP (VBP hate) (NP (PRP her)))) (. .)))