( ( ( Electromagnetic ( Wave ( A disturbance ) ) ) ( which propagates ) ) ( ( outward ( from ( ( an ( electric charge ) ) ( that ( ( oscillates or ) ( is accelerated ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (NNP Electromagnetic) (NNP Wave) (NNP A) (NNP disturbance)) (SBAR (WHNP (WDT which)) (S (VP (VBZ propagates))))) (VP (VBD outward) (PP (IN from) (NP (NP (DT an) (JJ electric) (NN charge)) (SBAR (WHNP (WDT that)) (S (VP (VP (VBZ oscillates)) (CC or) (VP (VBZ is) (VP (VBN accelerated))))))))) (. .)))
Electromagnetic Wave A disturbance which propagates outward from an electric charge that oscillates or is accelerated.
(ROOT (S (NP (JJ Electromagnetic) (NNS waves)) (VP (VBP are) (VP (VBN created) (PP (IN by) (NP (VBG oscillating) (NNS charges))))) (. .)))