( Orangutans ( ( are ( ( generally ( less vocal ) ) ( than ( most ( other primates ) ) ) ) ) . ) )
(ROOT (S (NP (NNS Orangutans)) (VP (VBP are) (ADJP (ADJP (RB generally) (RBR less) (JJ vocal)) (PP (IN than) (NP (JJS most) (JJ other) (NNS primates))))) (. .)))
Orangutans are generally less vocal than most other primates.
(ROOT (S (NP (DT A) (-LRB- -LRB-) (NN n) (-RRB- -RRB-) (NN orangutan)) (ADVP (RB generally)) (VP (VBZ lives) (ADVP (RB alone))) (. .)))