( Others ( ( contend ( that ( ( ( Schopf 's ) organelles ) ( ( are really ) ( ( the ( postmortem ( degradation products ) ) ) ( of ( prokaryotic cells ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNS Others)) (VP (VBP contend) (SBAR (IN that) (S (NP (NP (NNP Schopf) (POS 's)) (NNS organelles)) (VP (VBP are) (ADVP (RB really)) (NP (NP (DT the) (JJ postmortem) (NN degradation) (NNS products)) (PP (IN of) (NP (JJ prokaryotic) (NNS cells)))))))) (. .)))
Others contend that Schopf's organelles are really the postmortem degradation products of prokaryotic cells.
(ROOT (S (NP (JJS Most) (NNS organelles)) (VP (VBP are) (RB not) (VP (VBN found) (PP (IN in) (NP (JJ prokaryotic) (NNS cells))))) (. .)))