( ( To ( help ( make ( it ( more understandable ) ) ) ) ) ( , ( ( have ( children ( test ( ( the pH ) ( of ( ( various ( common substances ) ) ( like ( ( ( ( ( ( ( ( orange juice ) , ) water ) , ) ( baking ( soda solution ) ) ) , ) and ) milk ) ) ) ) ) ) ) ) . ) ) )
(ROOT (S (S (VP (TO To) (VP (VB help) (S (VP (VB make) (S (NP (PRP it)) (ADJP (RBR more) (JJ understandable)))))))) (, ,) (VP (VBP have) (S (NP (NNS children)) (VP (VB test) (NP (NP (DT the) (NN pH)) (PP (IN of) (NP (NP (JJ various) (JJ common) (NNS substances)) (PP (IN like) (NP (NP (JJ orange) (NN juice)) (, ,) (NP (NN water)) (, ,) (NP (JJ baking) (NN soda) (NN solution)) (, ,) (CC and) (NP (NN milk)))))))))) (. .)))
To help make it more understandable, have children test the pH of various common substances like orange juice, water, baking soda solution, and milk.
(ROOT (S (NP (NP (NNP Water)) (PP (CC plus) (NP (JJ other) (NNS substances)))) (VP (VBZ makes) (NP (DT a) (PRN (-LRB- -LRB-) (NP (NN n)) (-RRB- -RRB-)) (NN solution))) (. .)))