( ( Eukaryotic cells ) ( ( are ( ( symbiotic colonies ) ( of ( ( prokaryotes many ) ( of ( ( the symbionts ) ( called organelles ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (JJ Eukaryotic) (NNS cells)) (VP (VBP are) (NP (NP (JJ symbiotic) (NNS colonies)) (PP (IN of) (NP (NP (NNS prokaryotes) (JJ many)) (PP (IN of) (NP (NP (DT the) (NNS symbionts)) (VP (VBN called) (NP (NNS organelles))))))))) (. .)))
Eukaryotic cells are symbiotic colonies of prokaryotes many of the symbionts called organelles.
(ROOT (S (NP (JJS Most) (NNS organelles)) (VP (VBP are) (RB not) (VP (VBN found) (PP (IN in) (NP (JJ prokaryotic) (NNS cells))))) (. .)))