( ( ( ( ( ( ( Suspended ( within ( the ( chloroplast stroma ) ) ) ) ( is ( the ( thylakoid system ) ) ) ) , ) ( ( ( a ( highly ( dynamic collection ) ) ) ( of ( membranous sacks ) ) ) ( ( called thylakoids ) ( where ( chlorophyll ( is found ) ) ) ) ) ) and ) ( ( ( the ( light reactions ) ) ( of photosynthesis ) ) happen ) ) . )
(ROOT (S (S (S (VP (VBN Suspended) (PP (IN within) (NP (DT the) (JJ chloroplast) (NN stroma))))) (VP (VBZ is) (NP (DT the) (JJ thylakoid) (NN system)))) (, ,) (S (NP (NP (DT a) (RB highly) (JJ dynamic) (NN collection)) (PP (IN of) (NP (JJ membranous) (NNS sacks)))) (VP (VBD called) (NP (NNS thylakoids)) (SBAR (WHADVP (WRB where)) (S (NP (NN chlorophyll)) (VP (VBZ is) (VP (VBN found))))))) (CC and) (S (NP (NP (DT the) (JJ light) (NNS reactions)) (PP (IN of) (NP (NN photosynthesis)))) (VP (VBP happen))) (. .)))
Suspended within the chloroplast stroma is the thylakoid system, a highly dynamic collection of membranous sacks called thylakoids where chlorophyll is found and the light reactions of photosynthesis happen.
(ROOT (S (NP (DT The) (JJ light) (NNS reactions)) (VP (VBP take) (NP (NP (NN place)) (PP (IN in) (NP (DT the) (NN thylakoid))))) (. .)))