( ( can ( be ( transformed ( to ( ( other forms ) ( of ( energy ( such ( as ( ( ( ( ( ( ( light , ) heat ) , ) mechanical ) , ) or ) sound ) ) ) ) ) ) ) ) ) ) . )
(ROOT (S (VP (MD can) (VP (VB be) (VP (VBN transformed) (PP (TO to) (NP (NP (JJ other) (NNS forms)) (PP (IN of) (NP (NP (NN energy)) (PP (JJ such) (IN as) (NP (NP (NN light)) (, ,) (NP (NN heat)) (, ,) (NP (JJ mechanical)) (, ,) (CC or) (NP (NN sound))))))))))) (. .)))
can be transformed to other forms of energy such as light, heat, mechanical, or 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))))) (. .)))