( ( 1.5 ( Plant cells ) ) ( ( contain ( ( chloroplasts , ) ( ( the site ) ( of photosynthesis ) ) ) ) . ) )
(ROOT (S (NP (CD 1.5) (NNP Plant) (NNS cells)) (VP (VBP contain) (NP (NP (NNS chloroplasts)) (, ,) (NP (NP (DT the) (NN site)) (PP (IN of) (NP (NN photosynthesis)))))) (. .)))
1.5 Plant cells contain chloroplasts, the site of photosynthesis.
(ROOT (S (NP (NNS Photosynthesis)) (VP (VBZ occurs) (PP (IN in) (NP (DT the) (NN chloroplast)))) (. .)))
Photosynthesis occurs in the chloroplast.