( ( Assess ( ( the ( ( sources and ) forms ) ) ( of ( energy ( -LRB- ( ( ( ( heat ( , ( light ( , electricity ) ) ) ) , ) ( mechanical ( ( motions and ) sound ) ) ) -RRB- ) ) ) ) ) ) . )
(ROOT (NP (NP (NNS Assess)) (NP (NP (DT the) (NNS sources) (CC and) (NNS forms)) (PP (IN of) (NP (NP (NN energy)) (PRN (-LRB- -LRB-) (NP (NN heat) (, ,) (NN light) (, ,) (NN electricity)) (, ,) (NP (JJ mechanical) (NNS motions) (CC and) (NN sound)) (-RRB- -RRB-))))) (. .)))
Assess the sources and forms of energy (heat, light, electricity, mechanical motions and 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))))) (. .)))