( ( Cause ( Trichomonas vaginalis ) ) ( ( is ( ( a ( protist parasite ) ) ( that ( causes ( ( the ( sexually ( transmitted disease ) ) ) trichomonas ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Cause) (NNP Trichomonas) (NNS vaginalis)) (VP (VBZ is) (NP (NP (DT a) (JJ protist) (NN parasite)) (SBAR (WHNP (WDT that)) (S (VP (VBZ causes) (SBAR (S (NP (DT the) (RB sexually) (JJ transmitted) (NN disease)) (VP (VBZ trichomonas))))))))) (. .)))
Cause Trichomonas vaginalis is a protist parasite that causes the sexually transmitted disease trichomonas.
(ROOT (S (NP (NP (JJ Protist) (NNS diseases)) (PP (IN in) (NP (NNS humans)))) (VP (VBP are) (VP (VBN caused) (PP (IN by) (NP (NN protozoa))))) (. .)))