( ( Potential energy ) ( ( stored ( energy 2 ) ) . ) )
(ROOT (S (NP (JJ Potential) (NN energy)) (VP (VBD stored) (NP (NN energy) (CD 2))) (. .)))
Potential energy stored energy 2.
(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))))) (. .)))