( ( ( Some examples ) ( of matter ) ) ( ( are ( ( ( ( ( ( ( ( ( people , ) air ) , ) soil ) , ) water ) , ) and ) planets ) ) . ) )
(ROOT (S (NP (NP (DT Some) (NNS examples)) (PP (IN of) (NP (NN matter)))) (VP (VBP are) (NP (NP (NNS people)) (, ,) (NP (NN air)) (, ,) (NP (NN soil)) (, ,) (NP (NN water)) (, ,) (CC and) (NP (NNS planets)))) (. .)))
Some examples of matter are people, air, soil, water, and planets.
(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.