It's not a family story.
( It ( ( ( 's not ) ( a ( family story ) ) ) . ) )
(ROOT (S (NP (PRP It)) (VP (VBZ 's) (RB not) (NP (DT a) (NN family) (NN story))) (. .)))
It makes a good bedtime story.
( It ( ( makes ( a ( good ( bedtime story ) ) ) ) . ) )
(ROOT (S (NP (PRP It)) (VP (VBZ makes) (NP (DT a) (JJ good) (NN bedtime) (NN story))) (. .)))