( We ( ( ( ( ( ( may , ) ( for example ) ) , ) ( ( respond ( to ( a ( loud noise ) ) ) ) ( by ( saying ( `` ( That ( sounded ( like ( a gunshot ) ) ) ) ) ) ) ) ) . ) '' ) )
(ROOT (S (NP (PRP We)) (VP (MD may) (, ,) (PP (IN for) (NP (NN example))) (, ,) (VP (VB respond) (PP (TO to) (NP (DT a) (JJ loud) (NN noise))) (PP (IN by) (S (VP (VBG saying) (S (`` ``) (NP (DT That)) (VP (VBD sounded) (PP (IN like) (NP (DT a) (NN gunshot)))))))))) (. .) ('' '')))
We may, for example, respond to a loud noise by saying "That sounded like a gunshot."
(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))))))) (. .)))