( ( Animals and ) ( social ( `` animals ) ) )
(ROOT (NP (NP (NNS Animals)) (CC and) (NP (JJ social) (`` ``) (NNS animals))))
Animals and social &quot;animals
(ROOT (S (PP (IN For) (NP (JJ social) (NNS animals))) (, ,) (NP (NN communication)) (VP (VBZ essential)) (. .)))