( ( Calculate ( elastic ( potential ( elastic ( potential energy ) ) ) ) ) . )
(ROOT (S (VP (VB Calculate) (NP (JJ elastic) (JJ potential) (JJ elastic) (JJ potential) (NN energy))) (. .)))
Calculate elastic potential elastic potential energy.
(ROOT (S (S (VP (VBG Changing) (NP (NP (DT the) (NN shape)) (PP (IN of) (NP (DT an) (JJ elastic) (NN material)))))) (VP (VBZ gives) (NP (PRP it)) (NP (JJ potential) (NN energy))) (. .)))