a perceptive study of two families in crisis -- and of two girls whose friendship is severely tested by bad luck and their own immaturity 
(ROOT (NP (NP (DT a) (JJ perceptive) (NN study)) (PP (PP (IN of) (NP (NP (CD two) (NNS families)) (PP (IN in) (NP (NN crisis))))) (, --) (CC and) (PP (IN of) (NP (NP (CD two) (NNS girls)) (SBAR (WHNP (WP$ whose) (NN friendship)) (S (VP (VBZ is) (ADVP (RB severely)) (VP (VBN tested) (PP (IN by) (NP (NP (JJ bad) (NN luck)) (CC and) (NP (PRP$ their) (JJ own) (NN immaturity)))))))))))))
(ROOT (NP (NP (DT ) (JJ ) (NN )) (PP (PP (IN ) (NP (NP (CD ) (NNS )) (PP (IN ) (NP (NN ))))) (, ) (CC ) (PP (IN ) (NP (NP (CD ) (NNS )) (SBAR (WHNP (WP$ ) (NN )) (S (VP (VBZ ) (ADVP (RB )) (VP (VBN ) (PP (IN ) (NP (NP (JJ ) (NN )) (CC ) (NP (PRP$ ) (JJ ) (NN )))))))))))))