( Sound ( ( is ( ( ( a type ) ( of energy ) ) ( that ( requires ( waves ( traveling ( through matter ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Sound)) (VP (VBZ is) (NP (NP (DT a) (NN type)) (PP (IN of) (NP (NN energy))) (SBAR (WHNP (WDT that)) (S (VP (VBZ requires) (NP (NP (NNS waves)) (VP (VBG traveling) (PP (IN through) (NP (NN matter)))))))))) (. .)))
Sound is a type of energy that requires waves traveling through matter.
(ROOT (S (NP (JJ Sound) (NN energy)) (VP (VBZ travels) (PP (IN through) (NP (NP (NN matter)) (PP (IN in) (NP (NN wave) (NN form)))))) (. .)))