( Frequency ( , ( ( ( ( wavelength and ) speed ) ( of ( electromagnetic waves ) ) ) . ) ) )
(ROOT (X (ADVP (RB Frequency)) (, ,) (NP (NP (NN wavelength) (CC and) (NN speed)) (PP (IN of) (NP (JJ electromagnetic) (NNS waves)))) (. .)))
Frequency, wavelength and speed of electromagnetic waves.
(ROOT (S (NP (NP (DT The) (NN product)) (PP (IN of) (NP (NP (NP (DT a) (NN wave) (POS 's)) (NN wavelength)) (CC and) (NP (PRP$ its) (NN frequency))))) (VP (VBZ is) (NP (PRP$ its) (NN speed))) (. .)))