The Kal nodded.
( ( The Kal ) ( nodded . ) )
(ROOT (S (NP (DT The) (NNP Kal)) (VP (VBD nodded)) (. .)))
The Kal then shook its head side to side.
( ( The Kal ) ( then ( ( ( shook ( its ( head side ) ) ) ( to side ) ) . ) ) )
(ROOT (S (NP (DT The) (NNP Kal)) (ADVP (RB then)) (VP (VBD shook) (NP (PRP$ its) (NN head) (NN side)) (PP (TO to) (NP (NN side)))) (. .)))