( ( ( Be kind ) ( to animals ) ) ... )
(ROOT (S (VP (VB Be) (ADJP (JJ kind)) (PP (TO to) (NP (NNS animals)))) (: ...)))
Be kind to animals ...
(ROOT (S (PP (IN For) (NP (JJ social) (NNS animals))) (, ,) (NP (NN communication)) (VP (VBZ essential)) (. .)))