are paper-thin , and their personalities undergo radical changes when it suits the script . 
(ROOT (S (S (VP (VBP are) (ADJP (NN paper) (HYPH -) (JJ thin)))) (, ,) (CC and) (S (NP (PRP$ their) (NNS personalities)) (VP (VBP undergo) (NP (JJ radical) (NNS changes)) (SBAR (WHADVP (WRB when)) (S (NP (PRP it)) (VP (VBZ suits) (NP (DT the) (NN script))))))) (. .)))
(ROOT (S (S (VP (VBP ) (ADJP (NN ) (HYPH ) (JJ )))) (, ) (CC ) (S (NP (PRP$ ) (NNS )) (VP (VBP ) (NP (JJ ) (NNS )) (SBAR (WHADVP (WRB )) (S (NP (PRP )) (VP (VBZ ) (NP (DT ) (NN ))))))) (. )))