( ( In fact ) ( , ( ( a ( primary oocyte ) ) ( ( ( ( ( is , ) ( by ( its ( biological definition ) ) ) ) , ) ( ( a cell ) ( ( ( whose primary ) function ) ( is ( to ( divide ( by ( ( the process ) ( of meiosis ) ) ) ) ) ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN In) (NP (NN fact))) (, ,) (NP (DT a) (JJ primary) (NN oocyte)) (VP (VBZ is) (, ,) (PP (IN by) (NP (PRP$ its) (JJ biological) (NN definition))) (, ,) (NP (NP (DT a) (NN cell)) (SBAR (WHNP (WP$ whose) (JJ primary) (NN function)) (S (VP (VBZ is) (S (VP (TO to) (VP (VB divide) (PP (IN by) (NP (NP (DT the) (NN process)) (PP (IN of) (NP (NNS meiosis))))))))))))) (. .)))
In fact, a primary oocyte is, by its biological definition, a cell whose primary function is to divide by the process of meiosis.
(ROOT (S (NP (NP (DT The) (NN cell)) (VP (VBG starting) (NP (NNS meiosis)))) (VP (VBZ is) (VP (VBN called) (NP (DT a) (JJ primary) (NN oocyte)))) (. .)))