( ( For example ) ( , ( ( the ovary ) ( ( is ( ( an organ ) ( that ( produces ovules ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN For) (NP (NN example))) (, ,) (NP (DT the) (NN ovary)) (VP (VBZ is) (NP (NP (DT an) (NN organ)) (SBAR (WHNP (WDT that)) (S (VP (VBZ produces) (NP (NNS ovules))))))) (. .)))
For example, the ovary is an organ that produces ovules.
(ROOT (S (NP (NNP Ovulation)) (VP (VP (VBZ takes) (NP (NN place)) (PP (IN in) (NP (DT the) (NN ovary)))) (CC and) (VP (VBZ is) (NP (NP (NN part)) (PP (IN of) (NP (DT the) (JJ menstrual) (NN cycle)))))) (. .)))