( ( The ( electromagnetic spectrum ) ) ( ( is ( ( a continuum ) ( of ( electromagnetic waves ) ) ) ) . ) )
(ROOT (S (NP (DT The) (JJ electromagnetic) (NN spectrum)) (VP (VBZ is) (NP (NP (DT a) (NN continuum)) (PP (IN of) (NP (JJ electromagnetic) (NNS waves))))) (. .)))
The electromagnetic spectrum is a continuum of electromagnetic waves.
(ROOT (S (NP (DT The) (JJ electromagnetic) (NN spectrum)) (VP (VBZ represents) (NP (NP (DT the) (JJ full) (NN range)) (PP (IN of) (NP (NP (NN frequency)) (PP (IN of) (NP (JJ electromagnetic) (NNS waves))))))) (. .)))