( ( The thylakoids ) ( ( are ( ( the site ) ( of ( ( the ( light-dependent reactions ) ) ( of photosynthesis ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NNS thylakoids)) (VP (VBP are) (NP (NP (DT the) (NN site)) (PP (IN of) (NP (NP (DT the) (JJ light-dependent) (NNS reactions)) (PP (IN of) (NP (NN photosynthesis))))))) (. .)))
The thylakoids are the site of the light-dependent reactions of photosynthesis.
(ROOT (S (NP (DT The) (JJ light) (NNS reactions)) (VP (VBP take) (NP (NP (NN place)) (PP (IN in) (NP (DT the) (NN thylakoid))))) (. .)))