( There ( ( are ( ( ( about 50 ) ( different species ) ) ( of ( octopus ( living ( in ( ( all ( the oceans ) ) ( of ( the world ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (EX There)) (VP (VBP are) (NP (NP (QP (RB about) (CD 50)) (JJ different) (NNS species)) (PP (IN of) (NP (NP (NNS octopus)) (VP (VBG living) (PP (IN in) (NP (NP (PDT all) (DT the) (NNS oceans)) (PP (IN of) (NP (DT the) (NN world)))))))))) (. .)))
There are about 50 different species of octopus living in all the oceans of the world.
(ROOT (S (NP (NP (DT The) (NN majority)) (PP (IN of) (NP (NNS species)))) (VP (VBP live) (PP (IN in) (NP (DT the) (NN ocean)))) (. .)))