It may help a family stay together.
( It ( ( may ( help ( ( a family ) ( stay together ) ) ) ) . ) )
(ROOT (S (NP (PRP It)) (VP (MD may) (VP (VB help) (S (NP (DT a) (NN family)) (VP (VB stay) (ADVP (RB together)))))) (. .)))
This has no impact on a family.
( This ( ( has ( ( no impact ) ( on ( a family ) ) ) ) . ) )
(ROOT (S (NP (DT This)) (VP (VBZ has) (NP (NP (DT no) (NN impact)) (PP (IN on) (NP (DT a) (NN family))))) (. .)))