( ( For ( an example ) ) ( , ( ( refer ( to ( ( the densities ) ( of ( ( water-NaCl mixtures ) ( -LRB- ( ( ( density ( of water ) ) ( with ( dissolved NaCl ) ) ) -RRB- ) ) ) ) ) ) ) . ) ) )
(ROOT (S (PP (IN For) (NP (DT an) (NN example))) (, ,) (VP (VB refer) (PP (TO to) (NP (NP (DT the) (NNS densities)) (PP (IN of) (NP (NP (JJ water-NaCl) (NNS mixtures)) (PRN (-LRB- -LRB-) (NP (NP (NN density)) (PP (IN of) (NP (NN water))) (PP (IN with) (NP (NNP dissolved) (NNP NaCl)))) (-RRB- -RRB-))))))) (. .)))
For an example, refer to the densities of water-NaCl mixtures (density of water with dissolved NaCl).
(ROOT (S (NP (NP (NNP Sugar) (NNS crystals)) (VP (VBG dissolving) (PP (IN in) (NP (NN water))))) (VP (VBZ is) (NP (NP (DT an) (NN example)) (PP (IN of) (NP (NP (DT the) (NN formation)) (PP (IN of) (NP (DT a) (NN mixture))))))) (. .)))