( ( ( Social Communication ) ( Among Animals ) ) . )
(ROOT (S (NP (NNP Social) (NNP Communication)) (PP (IN Among) (NP (NNS Animals))) (. .)))
Social Communication Among Animals.
(ROOT (S (PP (IN For) (NP (JJ social) (NNS animals))) (, ,) (NP (NN communication)) (VP (VBZ essential)) (. .)))