( Power ( ( is ( ( the rate ) ( of ( energy ( ( use or ) production ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Power)) (VP (VBZ is) (NP (NP (DT the) (NN rate)) (PP (IN of) (NP (NN energy) (NN use) (CC or) (NN production))))) (. .)))
Power is the rate of energy use or production.
(ROOT (S (NP (NP (DT The) (NN rate)) (SBAR (IN that) (S (NP (NN energy)) (VP (VBZ is) (VP (VBN released)))))) (VP (VBZ is) (VP (VBN known) (PP (IN as) (NP (NN power))))) (. .)))