( ( Other parasites ) ( ( have ( included ( hookworm ( , ( bilharzia ( , ( and malaria ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (JJ Other) (NNS parasites)) (VP (VBP have) (VP (VBN included) (NP (NN hookworm) (, ,) (NN bilharzia) (, ,) (CC and) (NN malaria)))) (. .)))
Other parasites have included hookworm, bilharzia, and malaria.
(ROOT (S (NP (DT A) (NN hookworm)) (VP (VBZ is) (VP (VBN classified) (PP (IN as) (NP (DT a) (NN parasite))))) (. .)))
A hookworm is classified as a parasite.