( ( Sumatran orangutans ) ( ( ( ( are ( one ( of ( the ( great apes ) ) ) ) ) and ) ( are ( among ( ( the largest ) ( of ( all ( living primates ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NN Sumatran) (NNS orangutans)) (VP (VP (VBP are) (NP (NP (CD one)) (PP (IN of) (NP (DT the) (JJ great) (NNS apes))))) (CC and) (VP (VBP are) (PP (IN among) (NP (NP (DT the) (JJS largest)) (PP (IN of) (NP (DT all) (VBG living) (NNS primates))))))) (. .)))
Sumatran orangutans are one of the great apes and are among the largest of all living primates.
(ROOT (S (NP (DT A) (-LRB- -LRB-) (NN n) (-RRB- -RRB-) (NN orangutan)) (ADVP (RB generally)) (VP (VBZ lives) (ADVP (RB alone))) (. .)))