( ( ( The ( colloidal fraction ) ) ( of ( the ocean ) ) ) ( ( contains ( ( ( a ( large amount ) ) ( of ( organic matter ) ) ) ( unavailable ( to grazers ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (JJ colloidal) (NN fraction)) (PP (IN of) (NP (DT the) (NN ocean)))) (VP (VBZ contains) (S (NP (NP (DT a) (JJ large) (NN amount)) (PP (IN of) (NP (JJ organic) (NN matter)))) (ADJP (JJ unavailable) (PP (TO to) (NP (NNS grazers)))))) (. .)))
The colloidal fraction of the ocean contains a large amount of organic matter unavailable to grazers.
(ROOT (S (NP (NP (NNS Sediments)) (PP (IN in) (NP (JJ oligotrophic) (NNS lakes)))) (VP (VBP contain) (NP (NP (JJ large) (NNS amounts)) (PP (IN of) (NP (JJ decomposable) (JJ organic) (NN matter))))) (. .)))