( These ( ( are ( cell organelles ) ) . ) )
(ROOT (S (NP (DT These)) (VP (VBP are) (NP (NN cell) (NNS organelles))) (. .)))
These are cell organelles.
(ROOT (S (NP (JJS Most) (NNS organelles)) (VP (VBP are) (RB not) (VP (VBN found) (PP (IN in) (NP (JJ prokaryotic) (NNS cells))))) (. .)))