( ( Trichomoniasis Trichomoniasis ) ( ( is ( caused ( by ( the ( protozoan ( Trichomonas vaginalis ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Trichomoniasis) (NNP Trichomoniasis)) (VP (VBZ is) (VP (VBN caused) (PP (IN by) (NP (DT the) (JJ protozoan) (NNP Trichomonas) (NNS vaginalis))))) (. .)))
Trichomoniasis Trichomoniasis is caused by the protozoan Trichomonas vaginalis .
(ROOT (S (NP (NNS Trichomoniasis)) (VP (VBZ is) (VP (VB cause) (PP (IN by) (NP (DT a) (NN protozoa))))) (. .)))