( ( ( A ( plastic bottle ) ) ( filled ( with water ) ) ) ( ( would ( be ( one example ) ) ) . ) )
(ROOT (S (NP (NP (DT A) (JJ plastic) (NN bottle)) (VP (VBN filled) (PP (IN with) (NP (NN water))))) (VP (MD would) (VP (VB be) (NP (CD one) (NN example)))) (. .)))
A plastic bottle filled with water would be 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.