( ( Type ( II strains ) ) ( ( cause ( ( the majority ) ( of ( disease ( in humans ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Type) (NNP II) (NNS strains)) (VP (VBP cause) (NP (NP (DT the) (NN majority)) (PP (IN of) (NP (NP (NN disease)) (PP (IN in) (NP (NNS humans))))))) (. .)))
Type II strains cause the majority of disease in humans.
(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))))) (. .)))