( ( Potential energy ) ( ( is ( ( the ( stored ( or ( pent-up energy ) ) ) ) ( of ( an object ) ) ) ) . ) )
(ROOT (S (NP (JJ Potential) (NN energy)) (VP (VBZ is) (NP (NP (DT the) (JJ stored) (CC or) (JJ pent-up) (NN energy)) (PP (IN of) (NP (DT an) (NN object))))) (. .)))
Potential energy is the stored or pent-up energy of an object.
(ROOT (S (NP (JJ Potential) (NN energy) (NN energy)) (VP (VBZ is) (VP (VBN stored) (PP (IN in) (NP (DT a) (NN person) (CC or) (NN object))))) (. .)))