( ( ( ( ( ( Human beings ) ( are ( ( essentially social ) animals ) ) ) , ) and ) ( we ( are ( very ( dependent ( on ( each other ) ) ) ) ) ) ) . )
(ROOT (S (S (NP (NNP Human) (NNS beings)) (VP (VBP are) (NP (ADJP (RB essentially) (JJ social)) (NNS animals)))) (, ,) (CC and) (S (NP (PRP we)) (VP (VBP are) (ADJP (RB very) (JJ dependent) (PP (IN on) (NP (DT each) (JJ other)))))) (. .)))
Human beings are essentially social animals, and we are very dependent on each other.
(ROOT (S (PP (IN For) (NP (JJ social) (NNS animals))) (, ,) (NP (NN communication)) (VP (VBZ essential)) (. .)))