( There ( ( is ( no ( other ( way ( to ( explain ( ( so ( much animal ) ) behavior ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (EX There)) (VP (VBZ is) (NP (DT no) (JJ other) (NN way) (S (VP (TO to) (VP (VB explain) (NP (ADJP (RB so) (RB much) (JJ animal)) (NN behavior))))))) (. .)))
There is no other way to explain so much 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))))))) (. .)))