( ( Causes ( and ( Risks Trichomoniasis ) ) ) ( ( is ( ( caused ( by ( ( ( Trichomonas vaginalis ) , ) ( ( a ( single ( cell ( protozoan parasite ) ) ) ) ( with ( a ( whip-like tail ) ) ) ) ) ) ) ( that ( it ( uses ( to ( ( propel itself ) ( through ( vaginal ( and ( urethral mucus ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNS Causes) (CC and) (NNS Risks) (NNS Trichomoniasis)) (VP (VBZ is) (VP (VBN caused) (PP (IN by) (NP (NP (NNP Trichomonas) (NNS vaginalis)) (, ,) (NP (NP (DT a) (JJ single) (NN cell) (NN protozoan) (NN parasite)) (PP (IN with) (NP (DT a) (JJ whip-like) (NN tail)))))) (SBAR (IN that) (S (NP (PRP it)) (VP (VBZ uses) (S (VP (TO to) (VP (VB propel) (NP (PRP itself)) (PP (IN through) (NP (JJ vaginal) (CC and) (JJ urethral) (NNS mucus))))))))))) (. .)))
Causes and Risks Trichomoniasis is caused by Trichomonas vaginalis, a single cell protozoan parasite with a whip-like tail that it uses to propel itself through vaginal and urethral mucus.
(ROOT (S (NP (NNS Trichomoniasis)) (VP (VBZ is) (VP (VB cause) (PP (IN by) (NP (DT a) (NN protozoa))))) (. .)))