( ( ( Potential ( and ( kinetic energy ) ) ) ( ( Potential energy ) ( ( is often ) called ) ) ) ( ( stored energy ) . ) )
(ROOT (S (NP (NP (JJ Potential) (CC and) (JJ kinetic) (NN energy)) (SBAR (S (NP (JJ Potential) (NN energy)) (VP (VBZ is) (ADVP (RB often)) (VP (VBN called)))))) (VP (VBD stored) (NP (NN energy))) (. .)))
Potential and kinetic energy Potential energy is often called stored energy.
(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)))) (. .)))