( ( ( ( Human ( being ( are irrational ) ) ) and ) ( ( human behavior ) ( ( can only ) ( be ( described ( as bizarre ) ) ) ) ) ) . )
(ROOT (S (S (NP (NNP Human)) (VP (VBG being) (VP (VBP are) (ADJP (JJ irrational))))) (CC and) (S (NP (JJ human) (NN behavior)) (VP (MD can) (ADVP (RB only)) (VP (VB be) (VP (VBN described) (S (ADJP (RB as) (JJ bizarre))))))) (. .)))
Human being are irrational and human behavior can only be described as bizarre.
(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)))) (. .)))