( ( and ( animal behavior ) ) . )
(ROOT (S (VP (VB and) (NP (NN animal) (NN behavior))) (. .)))
and animal behavior.
(ROOT (S (NP (PRP We)) (VP (VBP call) (ADVP (DT any) (NN way) (SBAR (IN that) (S (NP (NNS animals)) (VP (VBP act))))) (, ,) (S (UCP (DT either) (ADVP (RB alone)) (CC or) (PP (IN with) (NP (NP (JJ other) (NNS animals)) (, ,) (NP (NN animal) (NN behavior))))))) (. .)))