( ( The semen ) ( ( will ( ( contain ( ( large numbers ) ( of sperm ) ) ) ( with ( ( ( tapered heads ) and ) ( many ( immature spermatids ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NN semen)) (VP (MD will) (VP (VB contain) (NP (NP (JJ large) (NNS numbers)) (PP (IN of) (NP (NN sperm)))) (PP (IN with) (NP (NP (JJ tapered) (NNS heads)) (CC and) (NP (JJ many) (NN immature) (NNS spermatids)))))) (. .)))
The semen will contain large numbers of sperm with tapered heads and many immature spermatids.
(ROOT (S (NP (NP (DT The) (NN head)) (PP (IN of) (NP (DT the) (NN sperm)))) (VP (VBZ contains) (NP (DT the) (NN nucleus))) (. .)))
The head of the sperm contains the nucleus.