( ( ( The molecules ) ( of ( real compounds ) ) ) ( ( attract ( each other ) ) . ) )
(ROOT (S (NP (NP (DT The) (NNS molecules)) (PP (IN of) (NP (JJ real) (NNS compounds)))) (VP (VBP attract) (NP (DT each) (JJ other))) (. .)))
The molecules of real compounds attract each other.
(ROOT (S (PP (VBN Compared) (PP (IN with) (NP (NP (DT the) (NNS molecules)) (PP (IN of) (NP (JJ many) (JJ other) (NNS substances)))))) (, ,) (NP (NP (NNS molecules)) (PP (IN of) (NP (NN water)))) (VP (VBP are) (ADVP (RB strongly)) (VP (VBN attracted) (PP (TO to) (NP (DT each) (JJ other))))) (. .)))