( ( Potential energy ) ( ( is ( energy ( stored ( in ( an object ) ) ) ) ) . ) )
(ROOT (S (NP (JJ Potential) (NN energy)) (VP (VBZ is) (NP (NP (NN energy)) (VP (VBN stored) (PP (IN in) (NP (DT an) (NN object)))))) (. .)))
Potential energy is energy stored in an object.
(ROOT (S (NP (NP (NNP Energy)) (SBAR (WHNP (WDT that)) (S (VP (VBZ is) (VP (VBN stored) (PP (IN in) (NP (DT a) (NN person) (CC or) (NN object)))))))) (VP (VBZ is) (VP (VBN called) (NP (JJ potential) (NN energy)))) (. .)))