( ( The ( mature sperm ) ) ( ( travel ( through ( ( ( the ( vas deferens ) ) , ) ( which ( are ( ( the tubes ) ( that ( ( carry ( the sperm ) ) ( from ( ( the epididymis ) ( to ( the penis ) ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (JJ mature) (NN sperm)) (VP (VBP travel) (PP (IN through) (NP (NP (DT the) (NN vas) (NNS deferens)) (, ,) (SBAR (WHNP (WDT which)) (S (VP (VBP are) (NP (NP (DT the) (NNS tubes)) (SBAR (WHNP (WDT that)) (S (VP (VBP carry) (NP (DT the) (NN sperm)) (PP (IN from) (NP (NP (DT the) (NNS epididymis)) (PP (TO to) (NP (DT the) (NNS penis))))))))))))))) (. .)))
The mature sperm travel through the vas deferens, which are the tubes that carry the sperm from the epididymis to the penis.
(ROOT (S (NP (DT A) (NN vas) (NNS deferens)) (VP (VBZ is) (NP (NP (DT the) (NN name)) (PP (IN of) (NP (NP (DT the) (NN tube)) (SBAR (WHNP (WDT that)) (S (VP (VBZ carries) (NP (NN sperm)) (PP (IN from) (NP (NP (DT the) (NNS epididymis)) (PP (TO to) (NP (DT the) (NN urethra)))))))))))) (. .)))