( ( The ( electromagnetic spectrum ) ) ( ( is ( ( the range ) ( of ( all ( possible ( electromagnetic ( radiation frequencies ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (JJ electromagnetic) (NN spectrum)) (VP (VBZ is) (NP (NP (DT the) (NN range)) (PP (IN of) (NP (DT all) (JJ possible) (JJ electromagnetic) (NN radiation) (NNS frequencies))))) (. .)))
The electromagnetic spectrum is the range of all possible electromagnetic radiation frequencies.
(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))))))) (. .)))