( ( as ( the ( ring contracts ) ) ) ( it ( ( pulls ( ( the mebrane ) ( inwards ( to ( divide ( ( the contents ) ( of ( ( the cytoplasm ) ( in cytokinesis ) ) ) ) ) ) ) ) ) . ) ) )
(ROOT (S (PP (IN as) (NP (DT the) (NN ring) (NNS contracts))) (NP (PRP it)) (VP (VBZ pulls) (SBAR (S (NP (DT the) (NN mebrane)) (VP (VBZ inwards) (S (VP (TO to) (VP (VB divide) (NP (NP (DT the) (NNS contents)) (PP (IN of) (NP (NP (DT the) (NN cytoplasm)) (PP (IN in) (NP (NNS cytokinesis))))))))))))) (. .)))
as the ring contracts it pulls the mebrane inwards to divide the contents of the cytoplasm in cytokinesis.
(ROOT (S (NP (DT The) (NN cytoplasm)) (VP (VBZ is) (VP (VBN divided) (PP (IN during) (NP (NNS cytokinesis))))) (. .)))