( ( Relate ( ( ( ( ( wavelength , ) ( wave speed ) ) , ) and ) frequency ) ) . )
(ROOT (S (VP (VB Relate) (NP (NP (NN wavelength)) (, ,) (NP (NN wave) (NN speed)) (, ,) (CC and) (NP (NN frequency)))) (. .)))
Relate wavelength, wave speed, and frequency.
(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))) (. .)))