( ( The ( South ( American ( water hyacinth ) ) ) ) ( ( is ( one example ) ) . ) )
(ROOT (S (NP (DT The) (NNP South) (NNP American) (NN water) (NN hyacinth)) (VP (VBZ is) (NP (CD one) (NN example))) (. .)))
The South American water hyacinth is one example.
(ROOT (S (NP (NP (CD One) (NN example)) (PP (IN of) (NP (NN matter)))) (VP (VBZ is) (NP (NN water))) (. .)))
One example of matter is water.