( ( The ( prostate gland ) ) ( ( is ( ( ( ( ( responsible ( for ( ( ( the ( proof semen ) ) , ) ( ( a ( liquid mixture ) ) ( of ( sperm cells ) ) ) ) ) ) , ) ( prostate fluid ) ) and ) ( seminal fluid ) ) ) . ) )
(ROOT (S (NP (DT The) (NN prostate) (NN gland)) (VP (VBZ is) (ADJP (ADJP (JJ responsible) (PP (IN for) (NP (NP (DT the) (NN proof) (NN semen)) (, ,) (NP (NP (DT a) (JJ liquid) (NN mixture)) (PP (IN of) (NP (NN sperm) (NNS cells))))))) (, ,) (ADJP (RB prostate) (JJ fluid)) (CC and) (ADJP (JJ seminal) (JJ fluid)))) (. .)))
The prostate gland is responsible for the proof semen, a liquid mixture of sperm cells, prostate fluid and seminal fluid.
(ROOT (S (NP (DT The) (NN prostate) (NN gland)) (VP (VBZ secretes) (NP (NP (DT a) (NN fluid)) (SBAR (WHNP (WDT that)) (S (VP (VBZ mixes) (PP (IN with) (NP (NN sperm))) (S (VP (TO to) (VP (VB help) (NP (NN form) (NN semen)))))))))) (. .)))