( ( Total energy ) ( ( is ( ( the sum ) ( of ( ( ( kinetic energy ) and ) ( potential energy ) ) ) ) ) . ) )
(ROOT (S (NP (JJ Total) (NN energy)) (VP (VBZ is) (NP (NP (DT the) (NN sum)) (PP (IN of) (NP (NP (JJ kinetic) (NN energy)) (CC and) (NP (JJ potential) (NN energy)))))) (. .)))
Total energy is the sum of kinetic energy and potential energy.
(ROOT (S (NP (JJ Thermal) (NN energy)) (VP (VBZ constitutes) (NP (NP (DT the) (JJ total) (JJ kinetic) (NN energy)) (PP (IN of) (NP (PDT all) (DT the) (NNS atoms) (SBAR (WHNP (WDT that)) (S (VP (VBP make) (PRT (RP up)) (NP (DT an) (NN object))))))))) (. .)))