( ( Electric Power ) ( ( is ( ( ( the rate ) ( per ( unit ( of Time ) ) ) ) ( ( at which ) ( ( electric energy ) ( is ( ( consumed or ) produced ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Electric) (NNP Power)) (VP (VBZ is) (NP (NP (DT the) (NN rate)) (PP (IN per) (NP (NP (NN unit)) (PP (IN of) (NP (NNP Time))))) (SBAR (WHPP (IN at) (WHNP (WDT which))) (S (NP (JJ electric) (NN energy)) (VP (VBZ is) (VP (VBN consumed) (CC or) (VBN produced))))))) (. .)))
Electric Power is the rate per unit of Time at which electric energy is consumed or produced.
(ROOT (S (NP (NP (JJ Electrical) (NN energy)) (VP (VBN consumed))) (VP (MD can) (VP (VB be) (VP (VBN expressed) (PP (IN as) (NP (NP (DT the) (NN product)) (PP (IN of) (NP (NP (NN power)) (VP (VBN multiplied) (PP (IN by) (NP (NN time))))))))))) (. .)))