( ( Chloroplasts ( -LRB- ( ( ( plant cells ) only ) -RRB- ) ) ) ; )
(ROOT (NP (NP (NNS Chloroplasts)) (PRN (-LRB- -LRB-) (S (NP (NN plant) (NNS cells)) (ADJP (JJ only))) (-RRB- -RRB-)) (: ;)))
Chloroplasts (plant cells only);
(ROOT (S (NP (NNS Photosynthesis)) (VP (VBZ occurs) (PP (IN in) (NP (DT the) (NN chloroplast)))) (. .)))
Photosynthesis occurs in the chloroplast.