( ( symbolic behavior ) ( ( is ( human behavior ) ) . ) )
(ROOT (S (NP (JJ symbolic) (NN behavior)) (VP (VBZ is) (NP (JJ human) (NN behavior))) (. .)))
symbolic behavior is human behavior.
(ROOT (S (NP (JJ Learned) (NN behavior)) (VP (VP (VBZ occurs) (ADVP (RB only)) (PP (IN after) (NP (NN experience) (CC or) (NN practice)))) (CC and) (VP (VBZ describes) (NP (RBS most) (JJ human) (NNS behaviors)))) (. .)))