( ( Sound energy ) ( ( is ( ( ( a form ) ( of energy ) ) ( that ( is ( associated ( with ( ( the vibrations ) ( of matter ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (JJ Sound) (NN energy)) (VP (VBZ is) (NP (NP (DT a) (NN form)) (PP (IN of) (NP (NN energy))) (SBAR (WHNP (WDT that)) (S (VP (VBZ is) (VP (VBN associated) (PP (IN with) (NP (NP (DT the) (NNS vibrations)) (PP (IN of) (NP (NN matter))))))))))) (. .)))
Sound energy is a form of energy that is associated with the vibrations of matter.
(ROOT (S (NP (NP (DT The) (NN sound)) (PP (IN in) (NP (DT a) (JJ loud) (NN classroom)))) (VP (VBZ is) (NP (NP (DT an) (NN example)) (PP (IN of) (NP (NP (DT a) (NN form)) (PP (IN of) (NP (NN energy))))))) (. .)))