I nodded again.
( I ( ( nodded again ) . ) )
(ROOT (S (NP (PRP I)) (VP (VBD nodded) (ADVP (RB again))) (. .)))
I did not have any reaction to what was said.
( I ( ( ( did not ) ( ( have ( any reaction ) ) ( to ( what ( was said ) ) ) ) ) . ) )
(ROOT (S (NP (PRP I)) (VP (VBD did) (RB not) (VP (VB have) (NP (DT any) (NN reaction)) (PP (TO to) (SBAR (WHNP (WP what)) (S (VP (VBD was) (VP (VBN said)))))))) (. .)))