( ( ( ( ( Cytokinesis ( is ( ( the stage ) ( ( during which ) ( ( ( ( the ( cell cytoplasm ) ) ( divides ( into ( ( approximately two ) ( equal parts ) ) ) ) ) and ) ( ( the cell ) ( actually ( splits apart ) ) ) ) ) ) ) ) , ) and ) ( it ( really ( ( ( begins ( while ( mitosis ( is occurring ) ) ) ) -- ) ( ( about midway ) ( through anaphase ) ) ) ) ) ) . )
(ROOT (S (S (NP (NNS Cytokinesis)) (VP (VBZ is) (NP (NP (DT the) (NN stage)) (SBAR (WHPP (IN during) (WHNP (WDT which))) (S (S (NP (DT the) (NN cell) (NN cytoplasm)) (VP (VBZ divides) (PP (IN into) (NP (QP (RB approximately) (CD two)) (JJ equal) (NNS parts))))) (CC and) (S (NP (DT the) (NN cell)) (ADVP (RB actually)) (VP (VBZ splits) (ADVP (RB apart))))))))) (, ,) (CC and) (S (NP (PRP it)) (ADVP (RB really)) (VP (VBZ begins) (SBAR (IN while) (S (NP (NNS mitosis)) (VP (VBZ is) (VP (VBG occurring))))) (: --) (ADVP (IN about) (NN midway) (PP (IN through) (NP (NN anaphase)))))) (. .)))
Cytokinesis is the stage during which the cell cytoplasm divides into approximately two equal parts and the cell actually splits apart, and it really begins while mitosis is occurring -- about midway through anaphase.
(ROOT (S (NP (DT The) (NN cytoplasm)) (VP (VBZ is) (VP (VBN divided) (PP (IN during) (NP (NNS cytokinesis))))) (. .)))