( ( In ( this system ) ) ( , ( attachment ( ( was ( related ( to ( sporozoite ( ( ( ( ( dose , ) ( incubation time ) ) , ) and ) ( host ( cell ( differentiation status ) ) ) ) ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN In) (NP (DT this) (NN system))) (, ,) (NP (NN attachment)) (VP (VBD was) (VP (VBN related) (S (VP (TO to) (VP (VB sporozoite) (NP (NP (NN dose)) (, ,) (NP (NN incubation) (NN time)) (, ,) (CC and) (NP (NN host) (NN cell) (NN differentiation) (NN status)))))))) (. .)))
In this system, attachment was related to sporozoite dose, incubation time, and host cell differentiation status.
(ROOT (S (NP (NNS Sporozoites)) (VP (VBP are) (NP (NP (DT the) (NNS cells)) (VP (VBN caused) (SBAR (IN that) (S (NP (NNS parasites)) (VP (VBD spread) (PP (IN through) (NP (PRP$ their) (NN host))))))))) (. .)))