( ( ( ( Forms ( of energy ) ) : ) ( ( ( ( ( ( motion , ) heat ) , ) light ) , ) sound ) ) . )
(ROOT (NP (NP (NP (NNS Forms)) (PP (IN of) (NP (NN energy)))) (: :) (NP (NP (NN motion)) (, ,) (NP (NN heat)) (, ,) (NP (NN light)) (, ,) (NP (NN sound))) (. .)))
Forms of energy: motion, heat, light, sound.
(ROOT (S (NP (NP (NNP Heat)) (, ,) (NP (NN light)) (, ,) (CC and) (NP (NN sound))) (VP (VBP are) (NP (NP (DT all) (JJ different) (NNS forms)) (PP (IN of) (NP (NN energy))))) (. .)))