( ( Brain cancers ) ( ( ( ( ( are ( among ( the ( ( most difficult ) malignancies ) ) ) ) ( to treat ) ) , ) ( in ( part ( because ( of ( ( their location ) ( in ( ( the ( body 's ) ) ( ( most ( ( complex and ) fragile ) ) organ ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NN Brain) (NNS cancers)) (VP (VBP are) (PP (IN among) (NP (DT the) (ADJP (RBS most) (JJ difficult)) (NNS malignancies))) (S (VP (TO to) (VP (VB treat)))) (, ,) (PP (IN in) (NP (NP (NN part)) (PP (RB because) (IN of) (NP (NP (PRP$ their) (NN location)) (PP (IN in) (NP (NP (DT the) (NN body) (POS 's)) (ADJP (RBS most) (JJ complex) (CC and) (JJ fragile)) (NN organ)))))))) (. .)))
Brain cancers are among the most difficult malignancies to treat, in part because of their location in the body's most complex and fragile organ.
(ROOT (S (NP (DT The) (NN brain)) (VP (VBZ is) (NP (NP (DT the) (ADJP (RBS most) (JJ complex)) (NN organ)) (PP (IN in) (NP (DT the) (JJ human) (NN body))))) (. .)))