Over the past three decades, external forces impinging on the family have transformed parents' and, therefore, children's lives.
( ( ( ( ( ( Over ( the ( past ( three decades ) ) ) ) ( , ( ( ( external forces ) ( impinging ( on ( the family ) ) ) ) ( have ( transformed ( parents ' ) ) ) ) ) ) and ) , ) ( therefore ( , ( children ( 's lives ) ) ) ) ) . )
(ROOT (S (S (PP (IN Over) (NP (DT the) (JJ past) (CD three) (NNS decades))) (, ,) (NP (NP (JJ external) (NNS forces)) (VP (VBG impinging) (PP (IN on) (NP (DT the) (NN family))))) (VP (VBP have) (VP (VBN transformed) (S (NP (NNS parents) (POS ')))))) (CC and) (, ,) (S (ADVP (RB therefore)) (, ,) (NP (NNS children)) (VP (VBZ 's) (NP (NNS lives)))) (. .)))
Children are exclusively influenced and transformed by how their parents act and behave.
( Children ( ( ( are exclusively ) ( ( ( influenced and ) transformed ) ( by ( how ( ( their parents ) ( ( act and ) behave ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Children)) (VP (VBP are) (ADVP (RB exclusively)) (VP (VBN influenced) (CC and) (VBN transformed) (PP (IN by) (SBAR (WHADVP (WRB how)) (S (NP (PRP$ their) (NNS parents)) (VP (VB act) (CC and) (VB behave))))))) (. .)))