( ( Parents ( have ( ( a ( hard time ) ) ( ( explaining ( some things ) ) ( to ( a child ) ) ) ) ) ) ( , ( ( ( do n't ) they ) ? ) ) )
(ROOT (SINV (S (NP (NNS Parents)) (VP (VBP have) (NP (NP (DT a) (JJ hard) (NN time)) (VP (VBG explaining) (NP (DT some) (NNS things)) (PP (TO to) (NP (DT a) (NN child))))))) (, ,) (VP (VBP do) (RB n't)) (NP (PRP they)) (. ?)))
Parents have a hard time explaining some things to a child, don't they?
(ROOT (S (NP (NNP Children)) (VP (VBP resemble) (NP (PRP$ their) (NNS parents)) (SBAR (IN because) (S (NP (PRP they)) (VP (VBP have) (NP (JJ similar) (NN dna)))))) (. .)))