( Suddenly ( there ( ( is ( ( the sound ) ( of ( ( a ( loud kiss ) ) ( followed ( by ( a ( shattering slap ) ) ) ) ) ) ) ) . ) ) )
(ROOT (S (ADVP (RB Suddenly)) (NP (EX there)) (VP (VBZ is) (NP (NP (DT the) (NN sound)) (PP (IN of) (NP (NP (DT a) (JJ loud) (NN kiss)) (VP (VBN followed) (PP (IN by) (NP (DT a) (JJ shattering) (NN slap)))))))) (. .)))
Suddenly there is the sound of a loud kiss followed by a shattering slap.
(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))))))) (. .)))