They want to regain their parents' warmth and approval as quickly as possible.
( They ( ( want ( to ( ( regain ( ( their ( parents ' ) ) ( ( warmth and ) approval ) ) ) ( ( as quickly ) ( as possible ) ) ) ) ) . ) )
(ROOT (S (NP (PRP They)) (VP (VBP want) (S (VP (TO to) (VP (VB regain) (NP (NP (PRP$ their) (NNS parents) (POS ')) (NN warmth) (CC and) (NN approval)) (ADVP (ADVP (RB as) (RB quickly)) (PP (IN as) (ADJP (JJ possible)))))))) (. .)))
They merely ignore their parents because they don't care about them.
( They ( merely ( ( ( ignore ( their parents ) ) ( because ( they ( ( do n't ) ( care ( about them ) ) ) ) ) ) . ) ) )
(ROOT (S (NP (PRP They)) (ADVP (RB merely)) (VP (VBP ignore) (NP (PRP$ their) (NNS parents)) (SBAR (IN because) (S (NP (PRP they)) (VP (VBP do) (RB n't) (VP (VB care) (PP (IN about) (NP (PRP them)))))))) (. .)))