( Power ( ( is ( ( the ( time rate ) ) ( of ( energy transfer ) ) ) ) . ) )
(ROOT (S (NP (NNP Power)) (VP (VBZ is) (NP (NP (DT the) (NN time) (NN rate)) (PP (IN of) (NP (NN energy) (NN transfer))))) (. .)))
Power is the time rate of energy transfer.
(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))))) (. .)))