She kept her most important papers in a purple despatch-case, which we must look through carefully."
( She ( ( ( ( kept ( her ( ( most important ) papers ) ) ) ( in ( ( ( a ( purple despatch-case ) ) , ) ( which ( we ( must ( ( look through ) carefully ) ) ) ) ) ) ) . ) '' ) )
(ROOT (S (NP (PRP She)) (VP (VBD kept) (NP (PRP$ her) (ADJP (RBS most) (JJ important)) (NNS papers)) (PP (IN in) (NP (NP (DT a) (JJ purple) (NN despatch-case)) (, ,) (SBAR (WHNP (WDT which)) (S (NP (PRP we)) (VP (MD must) (VP (VB look) (PRT (RP through)) (ADVP (RB carefully))))))))) (. .) ('' '')))
We don't need to look through the purple despatch-case.
( We ( ( ( do n't ) ( need ( to ( look ( through ( the ( purple despatch-case ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP We)) (VP (VBP do) (RB n't) (VP (VB need) (S (VP (TO to) (VP (VB look) (PP (IN through) (NP (DT the) (JJ purple) (NN despatch-case)))))))) (. .)))