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