( ( ( ( Chloroplast , ) ( found ( in ( plant cells ) ) ) ) , ) ( ( are ( responsible ( for photosynthesis ) ) ) . ) )
(ROOT (S (NP (NP (NNP Chloroplast)) (, ,) (VP (VBN found) (PP (IN in) (NP (NN plant) (NNS cells)))) (, ,)) (VP (VBP are) (ADJP (JJ responsible) (PP (IN for) (NP (NN photosynthesis))))) (. .)))
Chloroplast , found in plant cells , are responsible for photosynthesis.
(ROOT (S (NP (NNS Photosynthesis)) (VP (VBZ occurs) (PP (IN in) (NP (DT the) (NN chloroplast)))) (. .)))
Photosynthesis occurs in the chloroplast.